http://f30.bimmerpost.com/forums/sho...1314208&page=2
i'd get something like these, very light at under 19lbs. cast center with flow formed barrels for strength. you will notice a difference in acceleration, braking, overall handling.
it'd be easier if you at least give us some style preference. 5,6,7,8,9, 10, 12 spokes? twin spokes? y-spokes? U-spokes, mesh?