I ran an NSX in GT2. I saw a lot of them being used at Trackside in WI.
Also heard that the AMG Mercedes is good.
http://www3.towerhobbies.com/cgi-bin...?&I=LXPJS3&P=7
Type A's with soft inserts worked good at the track. (Carpet)
Here is a pic I took of all the cars so you can see the bodies being used.