Forza's content is always way above GT series imo.I had the Ps3 and sold it, and went back to Xbox360. I hope GT5 is finally something to shout about, its just a shame that the consol only has a couple of good titled games with decent online gameplay.
Its not worth buying a consol just for this game.
Wait for it to hit the shelves and get tested by others before splashing the cash.