[txcforever]

Well to tell you the truth I have a xbox 360 and I'm waiting for my ps3 to arrive soon. Xbox 360 has more good games that ps3 and in the games that are release in both consoles xbox 360 has slightly better performance. Still the best games for ps3 have yet to be released and let's not forget it's capability to play blu ray disks. As for Wii, well it's more casual than the other two and unless you really like the motion sensing controls and Nintendo games (mario, zelda , metroid etc) I wouldn't recommend it.
If I had to choose one of those right now, I would go with the 360 as it has more and better games than the other two, has slightly better performance than PS3 and it's cheap (slightly more expensive than Wii, even though if you buy it without a hard disk it's cheaper than Wii also).