Get the LM60 in 255/35/19 front and 275/35/19 rear. They'll fit the ZCP wheel perfectly and won't look stretched. I ran this setup last year and just put them on my car again yesterday. Performed really well no complaints.
2011 M3 ZCP | ESS SUPERCHARGED | AKRAPOVIC EVOLUTION | 20" HRE P40 | BREMBO BBK | B&G SPRINGS