I love my Orion Silver and Ivory White interior. It is very easy to keep clean. I was coming from my last Z4 which was Monaco Blue and was just as hard as black to keep clean. I still wash the car and detail almost as much as I use to, but now at least my efforts show longer.
I love how this car looks different in different light. I also think that this color really shows off the lines of the car.
2010 Z4 35i - Orion Silver, Ivory white extended leather, anthracite trim, premium pkg, sport pkg, premium sound pkg, cold weather pkg, navigation, 6 sp manual
2006 Z4 30i - Monaco Blue, beige leather
2003 Z4 2.5- Sterling Gray, black leather
1998 Z3 2.8 - Bright Red, black leather