Good luck on your search! Im sure some guys can help you out here, but just out of curiousity....you have an R8 V10 & a 430 Scuderia...why not let the M3 be what it is ? I assume its your daily driver anyway? and its an awesome daily driver!
2016 BMW X5d - Black Sapphire on Terra
2016 Range Rover HSE TD6-White on Ivory
2010 Audi R8 V10 Coupe 6MT-White on Red - gone but not forgotten