For what it's worth,
'Grid' (PS3) is a hoot except for the fact that you can't play your mate (split screen).
The Flashback System is a good bang for your buck 'cause it can keep you in a race even after wiping out in a world shattering crash at over 300mph. Nurburgring track is unreal, as are all the european and the US city tracks. Wish I could cash in the bank balance, currently something like $77,000,000.
I struggle with the drifting races though.
Review here:
GRID Review for PlayStation 3 - GameSpot
Good fill-in car game whilst waiting for GT5.
For the tragics out there amongst us, here is an update on what you can expect with GT5:
Gran Turismo 5 Release Date and Updated Information Announced - News - gran-turismo.com