The Wii, in terms of capability, is the last in the race. For now.
Im not leaving Microsoft, but I plan on getting a Wii, because the last non-nintendo thing I owned was the PS1, and before that, the Game Gear (Ghey piece of shit). But the 360 has so many awsome games, im not shelling out for Sony's excuse of a game console, but Im definatly not getting a Wii until Brawl or Umbrella Chronicals.
But the 360 that still works in my home I bought about 7 weeks ago. I just restart the game when it gives me an error, whitch it does about once a week, no more, sometimes less.