Supercars....

You can get teh Enzo from a few manufacturers, the most detailed from Tamiya.
You can get the Enzo FXX too
The Porsche Carrera GT (CGT)
HPI do the Diablo, Murcielago, Gallardo and Countach
Kyosho got the licence to make a 1/8 scale Aston Martin DBR9
Nobody else has made much of an impact on the supercar market yet. At the moment (and has been for a long time) everything is centered around Japanese sportscars.

Chris.