I can certainly see the new Cobra falling down on the road course. It's a real porker and thanks to the cast iron block it's now even more nose-heavy than before. It also doesn't have the brakes the STi does - those things are HUGE.
You know, I was sitting here thinking that it was a travesty to call a STi a "muscle car," but it does fit the formula in some ways. Muscle cars were big-engined versions of normal, mid-sized grocery getters. Except for the mid-sized thing, it's close!