3. Apple iMac
Just as a MacBook Air makes an exceptional Windows 7 Ultrabook, an iMac makes an exceptional all-in-one Windows 7 PC. It's very powerful, with a 3.5GHz Core i7, 8GB of RAM, 2GB of video RAM, and a 1TB hard drive (but no DVD drive; that's a $79 peripheral), and it's configurable up to 4GB of video RAM, 32GB of RAM, and a 3TB hard drive or 1TB SSD, as well as down to a 3.4GHz Core i5. Plus, it’s the only way to get a 27-inch built-in monitor on a new Windows 7 PC -- and a gorgeous one at that.