I brought this up in the 6 GC forum but I want to mention it here as well. I may be picky but the one thing I could not get past in the 650i GC is the seat belt placement. Its located in the seat and not in the pillar. I did not like the way I had to twist myself around in the seat to find the seat belt. I loved the 650i GC but walked away from because of the seat belt.
I encourage everyone to test drive and think about the seat belt before you jump into one.