I think people are missing the point about the interior. Obviously there has to be a tradeoff. The performance of the Corvette eclipses that of the M3, whereas the interior of the M3 is better than the Corvette.
2014 Jeep Cherokee Trailhawk V6
2011 BMW 335d, 2011 BMW 135i, 2006 Mazdaspeed 6 GT, 2000 BMW 323ci, 2003 Evolution VIII, 1995 Nissan 240sx w/ SR20DET