First: You already mentiones more games on Wii than 360
Second: you are only considering buying a 360 for multiplayer only, when you already have pc/ps3, both can provide you the multiplayer needs without paying.
Third: you want to play a lot of games, probably you wont have the time to focus on 360 multiplayers.
I am not a Wii owner and probably never be (owner 360/ps3), but acoording to your needs, Wii is the better choice.









