I would prefer a great car.
I borrowed a pal's Ferrari once and I had the best masturbation session EVER! My load hit the windshield so hard the airbags deployed. I was finally able to fantasize about drilling a Penthouse Pet.
Even with a great body, I could never imagine pulling a chick of that magnitude in my 1984 Oldmobile Omega even with the 15 inch rims.
On the other hand, if I were gay, I would prefer a great body because queers don't care about cars but love cock. Plus, I could imagine that the guy in the mirror with the hot body was some other dude and I could jack off to him.
Special "Yes, I really thought this through" Ed