Keep in mind that in order to make it appear to fill the fender, the car needs to be lower than for the same appearance with 16". Also, because the tire bulges out less, the tire will appear to lack the same volume when viewed from an angle.
Tracking with 17" wheels might be good for tirewall roll, but typically most 17" wheels are heavy as hell. A nice set of euro basketweave 15" or K1s are ideal track wheels. 14" are great too, but tires are harder to come by.