^ Your must be a Forza fanboy, I mean come on were working with a 5 year old computer here, Counterstike was still popular. It's only a $400 Machine it takes thousands of dollars to build a system that runs shadows etc well or do Anti-aliasing. It's a great game with great physic's and gameplay IMO.
I also race GTR2, and Race On so I do play more than just GT5. I have also played Forza which is great but I can only afford one system and bought a PS3 just for this game basically and my G25 does not work with Forza.