I have a coupe as well have the m3 wheels installed.. I ended up putting doing a "square setup" by using front wheels all the way around.. The offsets are now perfect!
335XI 6AT 11.87 @ 118mph
AR Design 3" Catless DP's | ER FMIC, CP & Tial Q BOV | BMS DCI | JB4 G5 ISO | Cobb AP | KW V3's | 19" E92 M3 Wheels | M3 Suspenion Bits |