Well just to explain. I don't think the brakes are bad at all as standard. Im more than happy with them and don't plan to turn the car into a permanent track toy.
The thinking was that i want the brakes to look nice, and so was looking to take the existing calipers of and have them sprayed dark grey with BMW logos on them.
Then I had a thought, a set of M3 calipers is dirt cheap to pick up second hand and i will need new pads/rotors some time next year, why don't i just upgrade at the same time so my current calipers aren't of and on, which is difficult as its my only car and i'm very dependant on it.
Therefore i could buy all the bits have them painted all lovely like, and do a whole fitting some time next year.
Just depends how much the carriers would be, is that what we call them here in the UK?