You know, now that I've seen the M5 (which I think is awesome by the way), I kind of like the exterior look of the E60s a little more. Having said that, I can say that I don't think the the M6 has had the same effect on me in regards to the 6er (which I think looks okay in its standard format).
The M6 (exterior-wise) just doesn't do it for me. I'm not really a big fan of the rear (even on the original) and I really hate the wheels. I've never been a big fan on the smoked chrome look, but since the spokes are relatively small on the M6's wheels, I just think there's too much black/gap that you can see through. I realize the M5 (past and present) has had smoke chrome wheels but both versions have had many spokes. Additionally, has anyone noticed that some E60 M5 photos show the car with clearcoats? Oh, and what is up with that funked up rosewood/burgundy color?? Not exactly a flattering color, I think, for marketing photos...