5)Lenvovo ideaCentre B520 and A320 All-in-Ones These two svelte all-in-ones from Lenovo come with 21.5 –inch screens. The B520 isn’t as slim as A320 , but it offers instant –on HDTV capability and comes with a built –in TV tuner to complemenet *Gb of RAM and 2TB of storage. The A320 packs a Core-i5 sandy