GT4 = New cars, new tracks, new physics system, refined game play = The greatest racing game ever (again), only on PS2
I like Xbox, and halo is one of my favorit FPSers, but frankly the controllers suck arse, and none of their racing games come close to the Gran turismo series. After having my 1st playstation in service for 6 years, I know my PS2 will last me another 2 at least (ordered it pre-release so i had it the first day it came out).
Between me and my bro's, we own gamecube, Xbox and PS2, each has their highlights, ps2 is my favorit though...