My buddy has an 2012 RS5, nice, quick, but I hate his interior and his Nav/Phone system. Too complicated. I dont knock it but I still prefer the M3. My car handles and responds better then his. I'm just going with my opinion from driving both....
BMC filter, OEM Exh Mod, ESS Direct Flash tune, flat black kidney grills, color painted front reflectors, LUX Angel eyes, -2012 SVT Raptor 4 dr -09 E90 M3