Ferrari Enzo model, which is high poly and not repaintable because of the way its textured. Not that you can't change the car's color if you want, but you can't add decals or anything cool. This car is probably in the 5000+ poly range.
Honda CRX by Adamodell. Its low poly, probably around the 2000 poly range, and its textured in such a way that you can add decals or drawn-in body kits if you want.
And I think the CRX might be worthy of a repaint. The Focus is kind of ugly, and I already have what, in my opinion, is a sweet S15.