I am probably going to only be buying GT5 and not prologue simply because I am tight on money. I have already Pre Ordered Metal Gear Solid 4 and I am waiting to pluck my money down on Soul Caliber 4, Disgaea 3, and Vakyrie Chronicles. Hopefully When GT5 comes out i will have enough spare change to buy it because the game does look good.
Systems I own (Games)
Sega: Dreamcast (40) , Saturn (25), Genesis (50), Masters System (10), Game Gear (20)
Sony: PS1 (8), PS2 (60) , PS3 (5), PSP (12)
Atari: 2600 (18) , 7800 (10), Lynx (10)