I was going to mention the Volvo Polestar, but it would have to be used. New ones are $$$.While the G8 GT is a nice car, why buy anything Pontiac since they went under? Goodluck finding one in decent shape that doesn't cost you an arm and a leg. Apparently people want to overcharge for the G8s now that they are discontinued. Same story with the GTO. Parts availability and expense in the future too.
Hyundai Genesis Sedan
(new) Camry v6
(new) Accord v6
Used Porsche Panamera
Volvo S60 T6(turbo and supercharged)