I'm sorry, did I say supercars... I meant to say Hypercars...
Ferrari FXX Evoluzione
SSC Ultimate Aero TT
Bugatti Veyron
Koenigsegg CCXR Special Edition
Ferrari F40 LM (Not the standard Version)
LAmborghini Murcielago LP640
Audi R8
Chevrolet Corvette C6 ZR-1
Dodge Hennessy Viper Venom TT
McLaren F1 (Road Version, GT, GTR, & LM = They may be old but they're still fast)
Porsche 911 GT1
Mercedes-Benz CLK-GTR Super Sport (7.3L V-12 750bhp)
Edo Competition Maserati MC12-XX (It has the same engine as that of the FXX)
Ferrari 430 Scuderia
Lamborghini Diablo SV (Old car... But it's still a bad boy of the road)
Ford Shelby GR1
Aston Martin DBR9
Any Exotics, LMP cars, GT racing cars, etc... as long as they will scrap those slow-ass Nissan Skylines and Mitsubishi LanEvo...