I agree with the comment that the OEM shifters are long on the M3. I was pretty surprised about that, but I think its a German thing. I was going to replace the knob myself, but I really like the fact that it lights up.
In that drifter movie in another post, did you check out the guys shifter that he has in his M3?. Its really long, and up inches from the steering wheel, so that he can shift quickly and keep his car drifting, that's the other extreme I guess.