Honestly, i wasn't too impressed with Gran Turismo HD either. Sure, it looks great but the cars locking on the brakes at any amount of a turn just put me right off. I'll stick to Ridge Racer 7 for the racing fix (until Motorstorm gets out).
The game selection is lacking but that is nothing new for console launches- us early adopters should be used to it by now. Considering what is coming down the pipeline i think it is well worth the wait.