If it's possible for me to retain the standard wheels I'd really like to do that due mainly to cost and in fact I do like the looks.
Reading one of your posts above I can see that you appear to be able to measure up whether the calipers will fit various wheel sizes etc. Do you have any way of knowing whether in fact the standard wheels will fit with the 355mm rotors? In fact, because the 135i is quite a light car, what about if I got 330mm rotors? Do you think they would fit then? I'm sure 330mm would be more than enough on the street and for my occasional track days.