I'm leasing and bought wheels/tires. I'm really liking the light, forged MORR wheels with Pilot Super Sports. I am keeping the stock wheels/tires to put back on at turn-in. I figure that I won't have to buy new tires then, so the cost is just shifted, and if I lease another 5, I can put the wheels on it.
The car really takes on a new character with the right wheels. I stayed with 19's for the performance/ride benefits, but 20's give you a nice look to stand out.
EDIT: Oh, I also got the BMW carbon filer spoiler. The car is AW, so this also stands out well. BMW gloss black grilles too. I am still mulling painted reflectors and side fender trim.
Redelivered: 2015 F80 M3 SO/SO MT, picked up at Welt 7/1/2014, dropped off in Antwerp 7/11, picked up again at my dealer 8/26