 Traded in my E46 M3 after 6 years.  Purchased a white 550i with Sport & Cold Weather packages & lots of other goodies.  The car looks fabulous; the LED side & rear lights and Angel Eye DRLs make the car unique and very attractive.  The acceleration, handling and fuel economy are comparable to my old M3 but without the "nervousness".  I've never purchased a car that gave me the satisfaction of ownership that I receive from my 550i.  The whole automobile is a work of art, from the anthracite tailpipes to the black front air intake; a study in black and white.  The Sport Package makes the current 550i better and more modern looking than the 2010 version.