How about an H5 Urban Sedan?? Based on a modified Zeta with standard AWD and supercharged 5.3L V8 at 400HP selling for $40K?? And an Alpha with a V10 at 500HP selling for $50K? I'm not talking the refinement of a Cadillac..... but sheer brute force horsepower... plain and simple.
Personally, I think the HUMMER design philosophy would translate very well into sedan form. So much for the 300C.
