It depends how you define "best".
Fastest? Or best feel / fun factor?
Which one is the best at 650PP, for the S-class races?
Oh, I thought these were classified as race cars. I will give them a try.KTM X-Bow R or the LCC Rocket.
Tommy Kaira ZZII.
Cheap, fully modifiable & gives me a 48.6 at Tsukuba