The M3 has always been great at balancing power, handling, ride, efficiency, reliability and comfort for the super enthusiast. When you drive one, you can feel its heritage.
Does the C63 strike a similar balance? This comparison test sheds some light: http://www.motorauthority.com/news/v...cedes-c63-amg/
It appears not. If you love torque and fishtailing more than handling or balance, the C63 might be your car. But if you love balance, the M3 is your car. Plus MB reliability has been terrible the last few years.