I LOVE the F10 M5 wheels, but I didn't think the replicas would fit, even with the 9.5in wide rep vs. the Avant Garde 10in wide M355. Hope they fit without rubbing...these will stick out an additional 22mm over the stock 8.5in ET47 staggered rear wheels. (2mm more than the GT Challenge car with the BBS)
Anxious to hear your feedback and see some pics...if it works out, I might have a hard time resisting ordering a set...
Offset calculator:
http://www.1010tires.com/WheelOffsetCalculator.asp