The car looks fantastic. Your first attempt turned out unbelievable!
You'll notice that your supply will definitely increase over your builds. You almost have to buy what you like these days for fear of not finding them at a later date or paying a much more exorbitant price for them.
Anyway, I think the Porsche looks great. I'm unsure of the wheel choice you have lined up for it, I wouldn't know what to think without seeing them on the car. In my mind I don't think they'd look to bad though.
Chris