Gran turismo 5 is currently the best sim racer that you can find on the market for CONSOLES.
Before talking about the game I must tell you all who I am. I love racing games. I only play racing and shooters and I just about buy every single DECENT looking racing game out there (I don't buy Need For Speed but I do buy all the shifts).
I have even played Forza 3 and 4 and I still have to admit this game is better in majority of the aspects.
The racing is exhilirating, car selection is fantastic but I wish there were less BS cars such as 30 different S2000's, 40 different GT-R's, and so on. track list is great (there will be a DLC on wednesday which I'm really excited for), and the physics are very realistic too. I have driven some high end exotics and I have also driven tuners and the physics are really just about right. There are many many tuning you can do to your car also.
I'm tired of typing and I'm gonna go back to playing, but this game is a 10/10 on my sight.