I didn't go for the 19" rims on my M Sport because they looked like the ones on a previous M3 I owned which was a bitch to keep clean. The good news is that with the ceramic break pads you find that the wheel keep amazingly clean from brake dust.
1995 325i,1996 328ci,1997 528i,1997 Z3 2.8,
2001 X5 3.0,2001 330i Conv,2002 M3 Conv,
2003 M3 Coupe,2004 M3 Coupe,2004 Z4 3.0,
2004 X3 3.0,2007 X3 3.0,2007 335i Conv.,
2013 X1 28 sdrive M Sport, 2014 M235 on order