Gorgeous car and love the rims. Want those for my F10.
I had the chance to drive and check out a 640i here in the states today while my rig was serviced and I absolutely loved it.
My only knock is the frameless windows. Meaning when you open the door; the windows are exposed at the top and it does that little shuffle downwards. Not sure why; but it bugged me.
Not enough to not want one though.