Here it is, TOP all in one computers 2013 :
If you work in an environment where you use touch screen all day, than this is what you need. Perfect interaction, TouchSmart interface works very well, the display is large and responsive. You can even recline it to about 45 degrees up the point that touch input becomes more comfortable than tapping on a vertically oriented screen. The computing power is way better than that of average all-in one PCs, it provides a top performance and comes with great tools that make it easy to manage your apps and secure your files. You can see full specifications here.
The most impressive qualities about this product is the fast processor which allows you to perform easy multitasking and the 1.5TB hard drive for all your needs. What also makes a difference is the wireless keyboard and mouse which allows you to freely choose your body position and feel comfortable when you use it. Its monitor is large and comes with built-in stereo speakers and a high-definition webcam. The touch works like a charm, is highly sensitive and Acer TouchPortal helps you synchronize your files and apps. It’s available in two models and you can find specifications for both of them here and here.
What I like about Lenovo is the adjustable screen. You can let it all the way down and use it for playing games from this flat position, some of which come pre-installed. Its design is more stylish than the competitors and the multi-touch function gives you the opportunity to connect with others by playing games with multiple partners if you want. The performance is basic, so I don’t recommend it for corporate or work use, but it’s nice for home entertainment. More technical details here.
The wonderful things about it are the fast, powerful quad-core processor, the large and attractive screen, great audio and the low price. It lacks touch screen and its performance is fair. The 2TB hard drive is ideal for keeping your files, photos and videos. It’s a good choice for media streaming and if you are a gamer, you will enjoy the HDMI with “Game Mode”. More specifications here
What I appreciate about iMac is the beautiful design, the wireless and thin keyboard and mouse. Its best features are the Thunderbolt port which can support up to six daisy-chained peripherals and data transfer speeds of up to 10Gbps in both directions and the Magic Trackpad. You will be delighted to see the 1920-by-1080 HD resolution and, if you like chatting, you will love the built-in FaceTime HD camera, giving 720p resolution and a 16:9 aspect ratio. Read more technical details here.