I like the GY's better, for pure looks anyway but you're correct, the 17's have more tires available. In a hand full of years, we won't have any 15's to use, and that's too bad. I like the wheel wells to be filled with tire, not wheels. It makes the Cobra look like a hot rod, and I love hot rods.
The popular look today is the "Pro Touring" with old muscle cars like the Camaro, birds, Vetts,..ect... and the 17-20" with a real low stance looks cool, just not on a Cobra. It may be that it's such a small & short wheelbase and lots of tough looking bulges ?
Someday, I'll have no choice but to buy the 17's.
