First generation BMW M3.
American muscle cars, particularly the Mustang, Camaro, GTO and Charger. Technically the Challenger is also good, but never did quite like it as much as the others.
Nissan Fairlady Z, Toyota Sports 800 or 2000GT.

But most of all?

Classic Italian cars. the old Lancia's, Alfa's, etc. Probably virtually impossible in this country, unless you have loads of cash, but by the heavens they do look beautiful. That and more unique than the other typical classics out there.