My first one was the Xanavi Nismo GTR, then for B-spec JGTC I bought the Raybrig NSX of 2006 (I think), the best looking NSX imho, and the Yellowhat Supra. The Nismo GTR is an amazing car, still have to drive my NSX and Supra myself. Also just won the Takata Dome NSX of 2003, one of my fave cars too. Like that one better than the newer model.

And just won the 1997 Castrol Tom's Supra, but like the newer Supra's better. One of my other fave JGTC cars (already since GT3) is the Denso Sard Supra, will buy that one too when I get the chance. Eventually I want to have all the JGTC cars. Too bad the Esso Ultraflow Supra doesn't seem to be in the game, was one of my fave cars in GT4.

But isn't the Motul Pitwork Nismo 350Z from 2006 the best JGTC car in the game? I think in GT4 that one was the best JGTC car. I reckon it's still a wonderful car in GT5.
About the NSX' in GT5, how do they drive? Since in GT3 and GT4 I thought they had a bit too much oversteer, that's why I always preferred the Skylines and Supra's, since they're more stable to drive.
Another JGTC car PD should include is the G-Zox Nismo 350Z from I think 2004. That one has an awesome black and orange livery.