Sorry but above you drive a c300 so clearly there is no way you can give any useful advice on which one makes a better daily driver! The m3 is the best of the 3 daily driver especially if DCT. Its automatic mode with 7 gears is so smooth. The isf auto is constantly shifting with 8 gears. The m3 is nicer interior and ride is much more compliant
The m3 is the epitomy of a daily driver sports car.