I have an M3 and a 2011 GT3RS for the track. Believe me you do not want to DD a GT3 RS. Granted I have some suspension mods (full RSS kit) and a exhaust bypass but even before with OEM suspension and exhaust the GT3RS is just too stressful as a DD. You cannot make a phone call in the car, you will not hear anything. The stereo is a joke. I got it because my dealer convinced me that the radio delete makes resale more difficult, but you cannot use it when you are driving. Plus the car, the RS version, is a bit flashy.
On the track where the RS shines. And it is tough car, can handle the beating of track use. Mine is full of rock chips, small crack on the windshield etc. You don't want that abuse on your DD.