tough question... but i'll try
10. Lamborghini Gallardo Spyder
9. Pagani Zonda Roadster F
8. Noble M400/M12
7. Ferrari Enzo
6. Hennessey Venom 1000 Twin Turbo
5. Porsche Carrera GT or GT2
4. Saleen S7
3. Maserati MC12
2. Koenigsegg CCX
1. McLaren F1
hows that?