Aston Martin DB9
Ferrari F430
Ford GT
Lamborghini Gallardo
Mercedes-Benz SL65 AMG
Porsche 911 Turbo S Cabriolet
I have to go with the F430. That is one stupid sexy car.
Here's the link if you need to read the comparision to make up your mind
http://www.caranddriver.com/article.asp?section_id=15&article_id=9743