love the 645 mine is silver i wish i got white. I only have the 19s. Were the 21s a dealer or factory option and what did it run you. I like them alot. By the way can you post some pics with the 6 in better lighting thanks. I love the 6 series. my 2nd BMW i ever has was a 88 M6 and still to this day it is my favcorite i am sorry i sold it.