Mineral Silver is Amazing
Before I ordered our 650 (due to arrive mid/late October), my wife and I checked out the colors on the BMW website. We discovered you need to drive to the dealership and actually look at the colors - because the website and photos don't really display the colors correctly.
Since there aren't a lot of 645s on the lots - you may have to spend an afternoon driving to different dealerships - but trust me, its worth it.
We instantly fell in love with MINERAL SILVER - its amazing. Stratus Gray is also very nice. Both colors change hue depeding on the sunlight.
[His] 2006 750i Sport - Jet Black, 21" wheels, premium sound, luxury seating, convenience, comfort access, Sirius (Jet)
[Hers] 2008 650i - Metallic Black, Sports, Prem Sound, HUD, HD Radio, Cold Weather, Sirius (Shiloh)
Moved on from:
2005 645Ci (Ava)
2004 545i (Chief)
2002 330i (Kira)
1998 528i (Slick)
1999 540i (Sly)