ps3 without a single doubt. When I put out money to buy a console, I want to do some gaming on it. The Wii is good for parties where everyone is drunk (probably due to the fact that you can beat most games with a lot of random flailing of the limbs). There is no way that it can stand up to the gaming potential that the ps3 has.
I know that you are all going to force feed me this BS about the ps3 not having any games, and even if I ignore the fact that the ps3 is coming out with a lot of new titles this year, there is still the fact that I'd rather play cod4 than 'Smash as many coconuts as you can with your wiimote".