I too like the designs. I love the Z4, and sound of the engine as you put the car to 60 as fast as you can with engine roaring. Personally, I'd get the 7 series in black with one certain type of wheels. Same with the 7 series before it.
Like M5 said, you don't like the design, BMW doesn't care b/c obviously many people love the 6 series. As of right now, all BMW dealers in the northeast part of Texas are out, and won't have any till 2005. The same goes for the Mini Coopers. BMW obviously knew about the 6 series sells going up, and must have known that a M6 needed to be built. IMHO, I think the M6 is going to sell well.
The 6 isn't really huge. Its a little big, but hey, for a car like that, who cares.