As an AW owner , I'm kinda biased...and as a former owner of a black E36, I'm sure....
White looks great all of the time, black is the best if you're a nut about keeping it clean, and can look past the inevitable swirls and imnperfections that any black will show.
With that I present..
2011 550i l Alpine White l Black Dakota l Anthracite Wood ; M Sport l Sport Auto Trans l Active Steering l Convenience Pkg l Driver Assistance Pkg l Prem. Pkg 2 l 4 Zone AC l Side/Top View Cameras l HUD w/ Extended Black Panel l BMW Apps/media l M Decklid Spoiler l ClearBra l V1 Radar ;Ordered 4/9/11,Delivered 5/21/11