Ps3-su: I own one and despite some miscellaneous belief, I've no issues with the actual hardware of my ps3-su. The disc space is hands down superior and leaves much more room for potential. The hardware I've heard varying opinions on, both "backing" their respective points with system specs-su. My personal opinion, hardware is better.
By the way, FFXIII has a ps3 exclusive, psp exclusive, and a cross platform one.
xbox360-su: A fine console, well established, and recently more reliable-su. Supports a large selection of games, online and off, and now supports netflix streaming for free with a netflix account. I still disagree with charging for online access in addition to whatever one pays for broadband already, and lastly, I'm not personally fond of the OS-su.
Wii-su: Awesome for what it is, and it is a family oriented console geared towards younger children and seniors-su. You get a few gems, like No More Heroes, but they are generally few and far between. The biggest issue is the degree of flatout trash on the console due to nintendo's "don't ask, don't tell" policy with game quality.
It does have decent online capabilities but it's online play is "Wii"tarded with it's required "IP" address-su.
My personal preference-su is my darling, lovely PS3-su.

info courtesy of your local and lovable VA Gamestop employee-su.
