Another thread resurrection!
For the record, you can fit the M3 staggered setup on a stock suspension easily without a roll. I ran the 225/45/R17 fronts with the 245/40/R17 rears for a while. I recently swapped over to a different wheel setup for the winter that looks kind of silly on the car.
Out of curiosity, can you roll the rear fenders without bending the flat lip on the fenders? I'd want to simply push the stock fender out another inch and keep it looking OEM in appearance. I really personally hate the super-rolled look I see on M3s all the time where the vertical lip is rolled horizontal to clean insanely wide wheels or low offsets.
AKA, not this where the fender profile is destroyed:
