Since you have a PC and a PS3, then buy the Wii.
The reason Xbox 360 is such a bad deal is that 99% of it's games are also on either the PC or PS3. And there's no X360 exclusive that's unique enough to set itself apart from PC/PS3 games (Gears of War 2 and Halo 3, for example, are from oversaturated genres)
The Wii not only has more games not available on PC/PS3, but also several of them are fresh in their own way.
Also, Xbox Live is a complete ripoff.







