Thanks guys, very helpful! Yes a big reason for looking around is cosmetic/appearance, hence looking at the BMW M Performance kit as a lower cost option. Likely will stick with the OEM kit at this point. Maybe I will simply paint the OEM calipers...
2011 Space Grey E90 M3, DCT, Comp. Pkg.
1997 Z3 2.8, Artic Silver, Tanin Red interior, MT
1974 2002tii, Inka, 5 sp manual