I also perfer the xbox and ps2. Playstation has the best games, followed by xbox...and gamecube lags way behing IMHO.
I've got an xbox...but will be getting a ps3 when they come out most likely.
The current is a big advantage in this kind of case...also you can generally pick up mono amps cheaper because they're not focused on the entire sound spectrum, so they don't cost as much to make.