Best touchscreen all-in-one
Dell XPS One 27 All-in-One Desktop
As a big-screen upscale all-in-one with touch and decent gaming chops, the latest version of Dell's XPS 27 is a great all-around home PC that covers a lot of bases.
Best cinematic desktop
Lenovo IdeaCentre B750
A refreshing new way to look at all-in-one desktops, the Lenovo B750's Blu-ray-friendly, extra-wide display is great for movies (if you add some extra software), and games greatly benefit from a wider field of view. It's different, and fun to use, but it cries out for a touch screen.
Best mainstream all-in-one
Apple iMac (21.5-inch, 2014)
While it includes some performance and graphics concessions on the lowest priced model, the 21.5-inch iMac brings Apple's iconic design and top-notch bundled accessories and software to a wider audience.