Lenovo Ultraslim ThinkCentre 91z

Not surprisingly, the company's really playing up aesthetics with the ThinkCentre Edge 91z, calling it the thinnest AIO, at 2.5 inches -- and certainly its thinner than, say, the HP TouchSmart 610. The centerpiece of the system is that glossy 21.5-inch widescreen HD Infinity LED display (1920 x 1200), which is capable of playing back HD video with ease.

The system ships with an optional spill-proof wireless keyboard, also packs built-in speakers, a 2MP webcam, six USB ports, Windows 7, and a 6-in-1 card reader.

At the high end, you'll get an Intel Core i7 quad-core processor, AMD Radeon HD6650A 1GB graphics, 8GB of DDR3 memory, and either a 1TB 7,200 RPM SATA HDD or an 80GB mSATA SSD -- either way, Lenovo says the system boots 30 percent quicker than "non-optimized" systems, though the latter promises to have you up and running in a breezy 20 seconds. It'll begin shipping in June, with pricing starting at $699.