Wish I saw this thread earlier...
Went to test fit the fronts:
Style 351 8.5x19" Wheel from the F10 550 Msport...
Had to use a 20mm spacer and it rubs, would probably need to grind down about 1-3mm - not doing that.
Then tried
Style 163 (CSL) - Reps - 9x19
I could get away with using a 10-15mm spacer, and the paint would need to be sanded down, off the caliper in 3 small sections. Doesn't clear it by 1mm - not doing that.
Test fitted a BC Forged 19" 3pc wheel, didn't even mount to the hub, lacks about 10mm clearance.
I'm going to test fit a 345 Replica wheel tomorrow (8.5x19 & 9.5x19) Will keep you guys posted.