My car came with stock rims and some worn rubber. I didn't notice until after the purchase that 2 were bent.
I took the opportunity to upgrade slightly. Initially I was after a set of M3 Contours but of the 2 sets I found, both were bent. One day on Kijiji, these caught my eye:
Only 1" larger than the stock rims. Visually the difference is nice, but the biggest change is the vibration that is missing from my steering wheel!
Put the soft top down then hard top on. Slick system really - 2 pins at the rear and 2 hooks on the windshield frame (same as the soft top). The pins, on top of fastening the hard top down, take care of the electrical connections for the rear defrost and interior cabin lights built into the hard top.