Didn't much care for most of the brands. 99% of them are just eco-boxes (or chavved up versions to appeal to teenagers and mid-life crisis sufferers).
Mazda - Go no, unless it's a 787B or an MX-5. Can't think of another decent Mazda.
Nissan - Go no. They haven't done anything special ever.
Audi? Ha ha ha.
Lancia - hmmmmm, they pushed the boundaries for years, but only a few are truly iconic. Maybe a Stratos would be nice, or an 037.
Ruf - can't see why anyone would want to willingly drive anything that is or once was a Porsche. Just don't get the appeal in the slightest.
So I voted Radical, as at least they make racing cars (as opposed to converted road cars). I didn't really want to vote, but then again I didn't want chavs winning the vote by asking for 800 types of Skyline in every possibly state of tune.