Some updates. Bought this M-Performance wheel form an M3 owner. It was filthy and less than half the price of new. 30 minutes of cleaning and it's good as new.
Before:
After:
Also, the front and rear brakes just showed up. I've wanted a StopTech Trophy BBK since I first saw them at SEMA a few years back. I'm in love.
Car has settled nicely and looks proper. Needs a wing and front splitter!