I have a 360--which I love. But, I plan on picking up a Wii as soon as they get them restocked. I mean, I realize that Wii is going to live and die on it's first party support (just like every nintendo system), but I must say that Zelda and mario almost never disappoint.
However, when it comes down to it, you're not going to be able to play something like Gears of War or Assassin's Creed on a Wii. Sometimes, I just want my games to look purty. And, let's face it, the Wii's hardware is basically a gamecube with a new controller.
P.S. SCREW E-BAY RESELLERS! If you bought the system just to resell it on e-bay at a higher price, you fail at life! Let gamers play. I can't get my hands on a Wii because losers with nothing else to do like to screw people out of their money.