While I do think it could look cool - I know I'll have turned the car in before the rotors need replacing, and they'd be covered by maintenance anyway.
I'm sure the new M brakes will be more than enough for the realities of my commute, plus the twisties in the mountains, so not sure the return on investment would be there for me.... but YMMV
I will, however, be splashing out on some winter rims and tires.....