Wow! I'm excited to see the outcome. I can't imagine what else could be done to the car. I'm guessing custom interior work (as others have already said). I love the M3 platform but at what point do you decide that you would have been better off buying an exotic?
'08 E90 M3 - Alpine White - Sold
'13 E92 M3 - Silverstone II - Sold
'04 E46 M3 - Jet Black - BBS E88, KW Clubsports, Brembo BBK, SuperSprint Exhaust, Recaro