Intro to Best Laptops Under $600
There are many great laptops on the market today, but what if you’re on a budget? In this blog post, we’ll take a look at some of the best laptops under $600. Whether you’re looking for a powerful laptop for work or school, or a lightweight laptop for travel, we have something for everyone. So without further ado, let’s take a look at some of the best laptops under $600!
Buyer’s Guide: How to Select the Best Laptops Under $600
1. Internal Specifications
When choosing a laptop under $600, you’ll want to focus on the internal specifications. This includes the CPU, the amount of RAM, and the size of the hard drive.
You’ll want to make sure that the CPU is a good one. The best CPUs for laptops are the Intel Core i5 and the Intel Core i7. You’ll also want to make sure that the laptop has at least 4GB of RAM, and that the hard drive is at least 500GB in size.
2. Display & Screen
The display and screen are also important considerations when shopping for a best laptop. You’ll want to make sure that the screen is at least 15 inches in size, and that it has a good resolution.
The best laptops under $600 have screens that offer a resolution of 1920×1080 pixels. This ensures that everything is going to look good, regardless of what you’re using the laptop for.
3. Portability
You’ should also to consider its laptop portability. Laptops that are light and easy to carry around are always a better choice than heavy and bulky laptops.
It might be a good idea to choose a laptop that offers an “ultraportable” option, which means that it is very light and thin. Ultraportable laptops usually weigh less than 3 pounds, making them very easy to carry around with you.
4. Connectivity
Another thing to consider when buying a budgeted laptop its connectivity. Laptops that offer a wide range of connectivity options are always a better choice than those that don’t.
Some of the most important connectivity options include USB ports, HDMI ports, and SD card slots. Most laptops with these connectivity options are able to connect with most USB devices, TVs, and printers.
10 Best Laptops Under $600
1. Acer Aspire 5 Slim Laptop, 15.6 inches Full HD IPS Display, AMD Ryzen 3 3200U, Vega 3 Graphics, 4GB DDR4, 128GB SSD, Backlit Keyboard, Windows 10 in S Mode, A515-43-R19L, Silver
This Acer Aspire 5 Slim laptop is the perfect device for busy professionals who need a powerful machine that’s still small and lightweight. The AMD Ryzen 3 3200U Dual Core Processor ensures efficient performance, while the 4GB DDR4 Memory provides enough storage for your files and programs. And with the 128GB PCIe NVMe SSD, you’ll be able to start up and load applications quickly. Plus, the 15.6 inches Full HD IPS Display offers stunning visuals whether you’re working or streaming your favorite show.
The Acer Aspire 5 Slim Laptop is the perfect computer for on-the-go business professionals. Its 15.6 inches full HD IPS display provides a clear view of all your work, while its AMD Ryzen 3 3200U processor ensures that your computer runs smoothly and quickly. And with its AMD Radeon Vega 3 Mobile Graphics, you’ll be able to enjoy all the multimedia you need without any lag time.
The Acer Aspire 5 Slim Laptop is a powerful device that’s perfect for on-the-go professionals. Featuring a 15.6 inch Full HD IPS display and AMD Ryzen 3 3200U processor, this laptop is perfect for getting work done on the go. With 1 USB 3.1 Gen 1 port, 2 USB 2.0 ports, and 1 HDMI port with HDCP support, you can easily connect to all of your devices.
The Acer Aspire 5 Slim Laptop is perfect for you! It has a 15.6 inch Full HD IPS Display, so you can enjoy your favorite shows and movies in stunning detail. Plus, it has an AMD Ryzen 3 3200U Processor, which ensures that you’ll be able to complete all of your work efficiently. And with 802.11ac Wi-Fi and up to 7.5 hours of battery life, you’ll be able to stay connected and productive even while on the go!
Pros
- It’s a fantastic choice for most day-to-day computing tasks.
- This is a fantastic bargain for the price.
- Best for college student.
- For basic web surfing, office work, and school studies, this HP is a great low-cost laptop..
- The NVMe SSD is quite fast, and many low-end laptops still do not have one.
Cons
- There’s no easy way to access the ram battery or the device.
2. Lenovo IdeaPad 3 14″ Laptop, 14.0″ FHD 1920 x 1080 Display, AMD Ryzen 5 3500U Processor, 8GB DDR4 RAM, 256GB SSD, AMD Radeon Vega 8 Graphics, Narrow Bezel, Windows 10, 81W0003QUS, Abyss Blue
The new Lenovo IdeaPad 3 14″ Laptop! Powered by AMD Ryzen 5 3500U Mobile Processors with Radeon Graphics, this laptop is perfect for everyday tasks. With a 14.0″ FHD 1920 x 1080 Display and 8GB of RAM, you’ll be able to work faster and play harder. Plus, the integrated AMD Radeon Vega 8 Graphics deliver powerful performance for all of your favorite games.
The Lenovo IdeaPad 3 14″ Laptop is perfect for online streaming, gaming, and more. The Dopoundsy Audio delivers crystal-clear sound, while the 14-inch FHD screen and narrow side bezels give you more viewing area and less clutter.
The Lenovo IdeaPad 3 14″ Laptop has all the features you need to stay connected on the go. With Bluetooth 4.1, up to 2×2 Wi-Fi 5, three USB ports, and HDMI, you can easily connect with your devices. The laptop also features a 14.0″ FHD 1920 x 1080 Display for stunning visuals and AMD Ryzen 5 3500U for powerful performance.
The Lenovo IdeaPad 3 14″ Laptop is perfect for anyone who wants to keep their privacy intact. With a physical shutter for your webcam, you can easily block it from being used without having to worry about someone seeing you. You’ll love the HD display and powerful AMD Ryzen 5 processor.
The Lenovo IdeaPad 3 14″ Laptop is a powerful and efficient device that is perfect for students and busy professionals. This laptop comes equipped with a DDR4 SDRAM, so you can work on demanding projects with ease. Plus, the 14.0″ FHD 1920 x 1080 Display ensures that your work will look great no matter what you’re working on.
The Lenovo IdeaPad 3 14″ Laptop is a powerful and efficient device that is perfect for students and busy professionals. This laptop comes equipped with a DDR4 SDRAM, so you can work on demanding projects with ease. Plus, the 14.0″ FHD 1920 x 1080 Display ensures that your work will look great no matter what you’re working on.
Pros
- The Price For This Outstanding Performing!
- Perfect for writing, browsing the web, and other on-the-go activities with a 14″ laptop
- It’s a wonderful deal, and the machine works well.
- This is a high-performance, light laptop with a long battery life.
- For a fantastic price, you get excellent quality.
- This is a good gaming laptop with exceptional performance.
- If you’re looking for a budgeted laptop, this is the one. I highly recommend it.
Cons
- The difficulty was that, after applying the windows upgrade, there were manufacturing issues.
3. HP 15-inch Laptop, 11th Generation Intel Core i5-1135G7, Intel Iris Xe Graphics, 8 GB RAM, 256 GB SSD, Windows 11 Home (15-dy2024nr, Natural silver)
This HP 15-inch laptop is perfect for people on the go. With its thin and light design, 6.5 millimeter micro-edge bezel display, and 82% screen to body ratio, you can take this PC anywhere and see more of what you love. Plus, it features a powerful 11th Generation Intel Core i5-1135G7 processor with Iris Xe Graphics, so you can work or play without interruption.
The new HP 15-inch Laptop, you can experience ultra-wide viewing angles and an immersive visual experience with its Full HD, IPS display. You’ll be able to seamlessly perform multi-monitor set-ups and get your work done with ease. Plus, with its powerful Intel Core i5 processor and Intel Iris Xe Graphics, this laptop is perfect for any task.
The HP 15-inch Laptop is the perfect device for working on the go. With its powerful Intel Core i5-1135G7 processor and lightning-fast connectivity, you’ll be able to stay productive no matter where you are. Plus, with its sleek design and vibrant display, this laptop is sure to stand out from the crowd.
The HP 15-inch Laptop is perfect for busy professionals who need to get work done on the go. With a long battery life of up to 7 hours, you can stay productive all day long. Plus, the powerful Intel Core i5-1135G7 processor and Intel Iris Xe Graphics let you tackle even the most demanding tasks with ease.
The HP 15-inch Laptop, 11th Generation Intel Core i5-1135G7, Intel Iris Xe Graphics is perfect for anyone looking for a powerful device. With HP Fast Charge, you can go from 0 to 50% charge in just 45 minutes, so you can get back to work quickly. And with its sleek design and powerful performance, this laptop is sure to impress.
Pros
- Unrivaled performance!
- So far, so good.
- For the price, it’s excellent value.
- The camera is excellent, with good color fidelity and quick updates.
- This HP PC is fantastic, and it’s especially wonderful for the price.
Cons
- Misleading Touchscreen Advertising With No Touchscreen
- Warranty issues
- High-end laptops can cost a lot of money.
4. HP 14 Laptop, AMD Ryzen 5 5500U, 8 GB RAM, 256 GB SSD Storage, 14-inch Full HD Display, Windows 10 Home, Thin & Portable, Micro-Edge & Anti-Glare Screen, Long Battery Life (14-fq1021nr, 2021)
The HP 14 Laptop is perfect for watching your favorite movies and TV shows in stunning 1080p resolution. With its AMD Ryzen 5 5500U processor and 8GB of RAM, this laptop is powerful enough to handle all your multitasking needs. And with 256GB of storage space, you’ll have plenty of room to store your photos, music, and videos.
HP 14 Laptop is perfect for keeping you productive while on the go. With 8 GB of RAM and 256 GB PCIe NVMe M.2 SSD storage, this laptop ensures that you’ll never have to sacrifice performance for convenience again. Plus, the 14-inch Full HD display provides a clear and immersive viewing experience.
The HP 14 laptop is perfect for on-the-go professionals. With up to 9 hours and 45 minutes of battery life, you can stay productive all day long. And with HP Fast Charge Technology, you can recharge your device quickly and get back to work.
The HP 14 Laptop is perfect for on-the-go professionals. With its Windows 10 Home operating system and 8 GB of RAM, the HP 14 Laptop is powerful and efficient. And with its 256 GB SSD storage, you can keep your most important files with you at all times.
Pros
- This laptop is best for traveling!
- If you’re searching for a simple and quick laptop, this is it.
- This is a great bargain for a power plant with low construction costs.
- 8 GB of RAM for a good, light gaming experience.
- The device work with anything a Bluetooth or WiFi chipset.
- The perfect PC, and a great deal on Prime Day
- Miniature gaming computer
Cons
- The keyboard and trackpad have a cheap feel to them.
5. 2021 Newest Dell Inspiron 3000 Laptop, 15.6 HD LED-Backlit Display, Intel Celeron Processor N4020, Bluetooth, Webcam, WiFi, HDMI, Win10 Home (8GB RAM | 128GB SSD)
The 2021 Dell Inspiron 3000 Laptop is perfect for busy people who need a reliable device that can keep up with their hectic lifestyle. With 8GB of high-bandwidth RAM, you can easily run multiple applications and browser tabs all at once. The 128GB PCIe NVME M.2 Solid State Drive provides ample storage space for your files, so you can always have them close at hand. Plus, the 15.6 HD LED-Backlit Display offers stunning visuals that will make your work or entertainment experience more enjoyable.
The 2021 Dell Inspiron 3000 is a powerful laptop that’s perfect for students and busy professionals. It features an Intel Celeron Processor N4020, 8GB of DDR4 RAM, and a 15.6 HD LED-Backlit Display. Plus, it comes with Windows 10 pre-installed so you can start using it right out of the box!
The 2021 Newest Dell Inspiron 3000 Laptop is perfect for the task. This powerful device comes with an HD (1366 x 768) Anti-Glare LED-Backlit Non-touch Display, so you can work in any environment, and Intel UHD Graphics with Shared Graphics Memory to easily handle all of your multimedia needs. Plus, the 15.6 HD LED-Backlit Display is perfect for watching movies or streaming TV shows on Netflix.
The 2021 Dell Inspiron 3000 laptop! With its 15.6 HD LED-Backlit Display, this device is perfect for on-the-go entertainment and productivity. And with 802.11ac 1×1 WiFi and Bluetooth, you can stay connected wherever you go. The 1 x SD Card Reader, 1 x USB 2.0, 1 x Wedge-shaped lock slot, and 1 x Power ports make it easy to connect your devices, while the 1 x HDMI 1.4b port lets you enjoy high-quality visuals on your TV or monitor. The 2 x USB 3.1 Gen 1 ports provide ample fast data transfer speeds, making it easy to quickly move files between devices.
Pros
- This is a fantastic laptop. It has a nice appearance.
- For the money, this is a great laptop.
- This is a really nice, quick, and clear screen. Well-made laptop.
- A simple, functional and lightweight laptop.
- It’s perfect for browsing, work, and zoom meetings.
Cons
The keyboard is not backlit.
6. 2021 HP 14 inch TouchScreen HD Laptop, Intel Celeron N4020, 4GB DDR4, 64GB eMMC, 1 Year Microsoft 365 Personal, Webcam, HDMI, Windows 10 S /Legendary Accessories (Google Classroom or Zoom) (Rose Pink)
This 14 inch HD touchscreen laptop is perfect for students and busy professionals. You’ll enjoy the power of an Intel Celeron N4020 processor, as well as 4GB DDR4 memory and 64GB eMMC storage. Whether you’re studying for finals or working on a project, this laptop has everything you need to be productive.
Look no further than the 2021 HP 14 inch TouchScreen HD Laptop. This machine is equipped with an Intel Celeron N4020 processor and 4GB of DDR4 memory, making it perfect for multitasking and heavier workloads. Plus, its 64GB eMMC storage ensures you’ll have plenty of space to store your files. And with its 14 inch touchscreen display, you’ll be able to work or play in comfort.
This HP 14 inch touchscreen laptop is perfect for on-the-go professionals. The Intel Celeron N4020 processor and 4GB DDR4 memory ensures you’ll be able to power through your work, while the 64GB eMMC storage provides ample space for your files. And with a USB 3.1 Gen 1 Type-C port and 2 USB 3.1 Gen 1 Type-A ports, you’ll be able to connect all of your devices.
The 2021 HP 14 inch TouchScreen HD Laptop is perfect for students and busy professionals. This computer is equipped with Windows 10 Home in S Mode, which means you’ll be able to get things done quickly and efficiently. The Legendary Computer Travel Laptop Backpack with USB Charging Port Fitting up to 15.6 Inch Laptop is a great way to take your laptop on the go, and the built-in charging port will keep your devices powered up while you’re on the move.
Pros
- A lightweight laptop that’s extremely portable.
- It’s a great laptop.
- It’s a fantastic product. It is a beautiful laptop.
- It’s really lovely. It has a rose gold color to it.
7. HP 17-inch Laptop, 11th Generation Intel Core i5-1135G7, Intel Iris Xe Graphics, 8 GB RAM, 256 GB SSD, Windows 11 Home (17-cn0025nr,Natural Silver)
This HP laptop is the perfect choice for anyone looking for a powerful machine that can handle any task. The 11th Generation Intel Core i5-1135G7 processor provides amazing performance, while the Intel Iris Xe Graphics ensures smooth graphics and video playback. Plus, the 17-inch screen is perfect for getting work done or watching movies.
The HP 17-inch laptop with 11th generation Intel Core i5-1135G7 and Intel Iris Xe Graphics. This amazing laptop provides a new level of graphics performance and crisp, stunning visuals – perfect for creating, gaming, and entertainment.
This HP laptop is perfect for anyone who wants a great viewing experience. The HD+ display provides stunning images with crisp quality and 1.4 million pixels. You’ll be able to enjoy your photos, movies, and games in style. Plus, the Intel Core i5-1135G7 processor ensures you can work or play at high speeds.
With the HP 17-inch laptop, you can take your work with you wherever you go. It features an anti-glare panel so you can easily work outdoors or in bright environments. Plus, its powerful Intel Core i5 processor and Intel Iris Xe Graphics will make sure your work runs smoothly.
Pros
- It arrived in a timely manner and as described.
- At a reasonable price, the platform is quite solid.
- A decent price, a good computer
- It’s quick – and it’s excellent.
- The large screen and bright display make it simple to operate.
- This is a simple machine that may be operated by almost anybody.
- This product is perfect for a student because it’s affordable and provides good performance.
Cons
- Some users complains that Within a week, the screen had cracked.
8. 2022 Newest Lenovo IdeaPad 3 Laptop, 15.6″ FHD Display, Intel Dual-Core Processor, Intel UHD Graphics, 8GB RAM, 256GB PCIe SSD, Fingerprint Reader, Webcam, HDMI, Bluetooth 5.0, Grey, Windows 11
The Lenovo IdeaPad 3. Featuring an Intel Pentium Gold 7505 3.5GHz dual-core processor, this laptop is capable of handling even the most demanding tasks. Plus, its 15.6″ FHD display ensures that you’ll enjoy stunning visuals no matter what you’re working on. Whether you’re catching up on emails or streaming videos online, the Lenovo IdeaPad 3 is perfect for keeping you productive and entertained wherever you go.
The newest Lenovo IdeaPad 3 laptop! This powerful machine is perfect for students, professionals, and busy families. With a large 15.6″ screen, Windows 11 Home operating system, and 64-bit capabilities, this laptop can handle any task you throw at it. Whether you’re completing assignments for school, working on a project for work, or streaming your favorite show online, the Lenovo IdeaPad 3 is the perfect computer for you. Plus, with its sleek design and powerful performance, this laptop is sure to turn heads wherever you go.
The newest Lenovo IdeaPad 3 laptop! This powerful device is perfect for busy professionals who need a reliable and efficient computer. The Connectivit 11ac, 2×2 + BT5.0 allows you to stay connected and productive even when on the go. Plus, the 15.6″ FHD Display provides stunning visuals that are sure to impress clients and colleagues alike.
Pros
- So far, everything has gone smoothly!
- Excellent video quality, simple to operate and light in weight
- A High-End Computer
- This tent is incredibly light and simple to set up.
- My favorite brand is Lenovo.
- That laptop is really wonderful.
Cons
- The screen is black or completely white.
9. 2021 Latest Dell Inspiron 3510 Laptop, 15.6″ HD Display, Intel Celeron N4020 Processor, 16GB DDR4 RAM, 1TB Hard Disk Drive, Webcam, WiFi, HDMI, Bluetooth, Windows 10 Home, Black
The 2021 Dell Inspiron 3510 Laptop is perfect for anyone who wants a powerful machine that can keep up with their busy lifestyle. With 8GB of high-bandwidth RAM, you’ll be able to smoothly run multiple applications and browser tabs all at once. The 128GB PCIe NVME M.2 Solid State Drive also allows for fast bootup and data transfer, so you can get started on your work as quickly as possible.
This Dell Inspiron 3510 laptop is perfect for anyone on the go. Its 15.6″ HD display is perfect for watching movies or working on projects, and its Intel Celeron Processor N4020 ensures that you’ll be able to get your work done quickly and easily. Plus, its 8GB of memory means that you’ll be able to store all of your important files without having to worry about running out of space.
The 2021 Latest Dell Inspiron 3510 Laptop! This powerful device has everything you need to stay productive on the go. With its 15.6″ HD Display, Intel Celeron N4020 Processor, and 802.11ac 1×1 WiFi and Bluetooth, you can work and play with ease. Plus, the 1 x SD Card Reader and 1 x USB 2.0 make it easy to transfer files or connect peripherals. And with its Wedge-shaped lock slot, you can keep your device safe and secure.
The Dell Inspiron 3510 laptop is perfect for students and busy professionals. With its Windows 10 operating system and Intel Celeron processor, this laptop was built for speed and performance. Plus, the 15.6-inch HD display ensures that you’ll never miss a beat. So if you’re looking for a powerful and efficient laptop, the Dell Inspiron 3510 is perfect for you!
Pros
- It’s worth twice what I spent.
- It’s a tiny, lightweight laptop with a user-friendly design.
- It’s fantastic! You should definitely buy it!!
- A wonderful present
- Its an excellent product! I highly suggest purchasing it!!
- I will get you a Dell computer that you will fall in love with.
Cons
- Touch screen should not be touched.
10. Lenovo IdeaPad 3 17.3″ Laptop, 17.3″ HD+ (1600 x 900) Display, AMD Ryzen 5 5500U Processor, 8GB DDR4 RAM, 512GB M.2 SSD Storage, AMD Radeon 7 Graphics, Windows 10 Home, 82KV003MUS, Abyss Blue
The Lenovo IdeaPad 3. Featuring an AMD Ryzen 5 5500U Processor, 8GB DDR4 RAM, and 512GB SSD storage, this notebook is more than capable of handling anything you throw at it. Plus, its 17.3-inch HD+ display provides stunning visuals whatever you’re working on. So if you’re looking for a powerful and versatile laptop, the Lenovo IdeaPad 3 is the ideal choice.
The Lenovo IdeaPad 3 17.3″ Laptop’s spacious 17.3-inch display. The HD+ resolution (1600 x 900) is great for watching movies or streaming TV shows, while the AMD Ryzen 5 5500 processor ensures you’ll be able to handle all your everyday tasks with ease. And when it’s time for some downtime, the Radeon 7 Graphics will render your games and videos beautifully.
The Lenovo IdeaPad 3 is perfect. With its HD+ display, crystal-clear sound, and powerful AMD Ryzen 5 processor, this laptop is sure to take your computing experience to the next level. Whether you’re streaming music, watching videos, or video-chatting with friends and family, you’ll love everything this laptop has to offer.
Lenovo IdeaPad 3 17.3″ Laptop is the perfect device for on-the-go productivity. With a physical shutter on your webcam, you can keep your privacy intact when you need it. Plus, its AMD Ryzen 5 5500 processor ensures seamless multitasking and immersive gaming experiences.
The Lenovo IdeaPad 3 17.3″ Laptop is perfect for busy professionals who need a powerful machine that can keep up with their demanding schedules. WiFi 6 (2.2 802.11 ax) and Bluetooth 5.0 connectivity ports let you stay connected in any environment, while the AMD Ryzen 5 5500 processor ensures your applications run smoothly even when multitasking. The 17.3″ HD+ (1600 x 900) display provides plenty of screen real estate to work on multiple documents or watch your favorite shows, and the included SD card reader makes it easy to transfer files to and from your device.
Pros
- Out of the box, it works very well.
- Excellent Laptop for Work and Light Gaming
- Super fast and at a great price!!
- This is a really decent laptop.
Cons
- It’s lovely, and the touchpad is awful.
- The battery claims six hours of usage, which isn’t very long.
Common Questions and Answers – FAQs
Can these laptops be used for gaming?
Yes, these laptops can be used for gaming. However, if you are looking for a laptop that is specifically for gaming, you may need to consider a higher budget. Laptops that are marketed as gaming laptops typically have better graphics and processing power, which can be helpful for gaming.
If you are looking for a laptop that can be used for both basic and gaming purposes, then it is important to look for a laptop that has at least the following specifications:
A graphics unit that is compatible with games such as Dota 2 and League of Legends
A processor that is at least a Core i5 or equivalent
8GB of RAM or more
A large hard drive, preferably 1TB or more
Which storage unit to go with in case of $600 Laptops?
If you are looking to buy a laptop for under $600, it is important to consider the type of storage unit that the laptop has. Laptops with a solid state drive (SSD) typically have a higher price tag, but they offer faster speeds and longer battery life than laptops with a hard disk drive (HDD). If you are looking for a laptop that has good performance and is gaming-friendly, it is recommended to go with an SSD.
However, if you are looking for a laptop that has a large storage capacity, then it is recommended to go with an HDD. Laptops that have an SSD may be more expensive, but they do not typically exceed $600. So if you are trying to keep your budget as low as possible, it is recommended to go with a laptop that has an HDD.
Can these budget laptops live up to professional preferences?
Yes, these laptops can live up to professional preferences, but only if you are not looking for a laptop that has high-end specifications. For example, if you are a graphic designer or video editor, you may need a laptop that has a better graphics unit and more RAM in order to meet your professional needs.
Also, if you are looking for a laptop that has good battery life, then it is important to consider the battery life of laptops within this price range. If you are looking for a laptop that can last up to 5 hours on one charge, then consider getting a laptop that has a high capacity battery. However, if you are not as concerned about the battery life and are looking for a laptop that has a lower price tag, then you can go with a laptop that has a standard battery.
Which features must be prioritized by students?
For students, it is important to prioritize laptops that have a good amount of storage and are affordable. Many students do not need a laptop that has high-end specifications, and they can save money by going with a laptop that has a standard battery or HDD.
Another important factor for students is the size of the laptop. Laptops that are 15 inches or larger can be heavy and bulky, which can be a struggle for students who have to carry their laptop around with them. Therefore, it is recommended to go with a laptop that is 14 inches or smaller, which will be more manageable for students.
Conclusion:
If you’re looking for an affordable laptop that will do everything from watching movies, browsing social media, playing games or doing work, this article has some great options!
We hope that these reviews have helped you narrow down your options. If it has, we encourage you to take a look at our top picks for the best laptops under $600!