Wii60 for me this generation :p
Wii: Gonna have SSB:B, that alone is enough reason to buy it, but most of the other titles are looking pretty awesome as well.
Xbox 360: Decent library, great online system, a definite contender in my book.
PS3: Unless theres some crazy price dropping happening between now and release, I ain't going to be gettting one of these any time soon, that and Sony's arrogance is starting to get too me (seriously, claiming that Microsoft is copying them? The tilt sensors were an obvious (poor) last minute effort to try and steal some of Nintendo's thunder, but claiming Microsoft is copying them shortly before announcing "entitlement" points (O GEE, where have I heard that before)
Seriously though, claiming someone is copying you before you go and blantantly copy one of their ideas is just plain arrogance beyond belief.