Actually, different cars for different people....some people just like pure torque and going fast straight and driving an automatic...C63 or ISF is for them....
But if you want a car built like a race car and enjoy driving involvement in a balanced car, the new M3 is it....
http://www.motortrend.com/roadtests/...amg_comparison
http://www.caranddriver.com/reviews/...omparison_test
http://www.caranddriver.com/reviews/...omparison_test
http://www.caranddriver.com/reviews/...w_m3_road_test