After a friend rode in my Challenger, that weekend he went an bought his mid life crisis car: Camaro SS SS. Its pretty nice. Its like a gunmetal gray with black rims. Like you noted with the rental, its huge and small at the same time. The inside makes my Challenger feel like a limo. My friend is 6'4", and looks kinda cramped in it. In my car he can extend his legs. Visibility also seems low.
Still, its hard to go wrong with any of these modern muscle cars, even the V6's. I see people driving the V6's, and they smiling ear to ear like they have supercharged V8s. Such fun cars to drive.