Originally Posted by imolazhp_ci
everyone is looking at this wrong... it's not about the weight savings for speed. its about lowering weight from the top of car, which lowers the center of gravity by fairly large margin, which increases the handling GREATLY.
No, I'm not ignoring that issue. The difference of 11 lbs between steel & CF roof you will never feel unless you race. The difference of ~46 lb. between steel roof with sunroof and CF roof w/o you will only feel under track conditions. I comes down to what pushes your buttons. I use the sunroof in my E46 frequently, but I'd be willing to sacrafice it for the uniqueness of the CF roof. I guess, if I had the choice, I'd take the CF roof with sunroof, but looks like that will not be an option from BMW, though it's been done.