My G80 is PB, and my X3 M40 is Tanzanite. SMB is my favorite, but PB is a pretty good approximation for 4,500 less.
Tanzanite looks great on the X3, but it's dark and needs to be clean or it looks black. Much better than carbon black though - the blue here shines through clearly.
Also have a pic with Interlagos and Le Mans. I love BMW blue