Not too sure at the mo, torn between 360 and PS3.
Used to have a PS2 and an XBox, but sold the PS2 because I felt the XBox was a lot better.
However, all my other AV gear, bar the 50" Pioneer plasma , is Sony, so a PS3 would fit it nicely if I can wait till next year. Having said that, the 360 seems to match the Sky+ box so I could go that route... although Sky will be bringing out a new box next year when they launch their hi-def service so perhaps I should wait till then.... Oh decisions decisions decisions ....
One of the first games for the 360 though sounds very good. Can't recall the name but it's a similar concept to GTA, not as big as San Andreas but sounds just as good if not better.