paradox: Well both the factory radio and the factory navigation screen that go in that area are black stock. Unfortunately, if I painted it silver, it would look like silver paint. That silver on the dash is not just painted plastic. It's actually brushed aluminum metal, which has it's ups and downs -- upside is that it looks and feels awesome; downside is that it's impossible to match with paint, and it picks up dirt/grease from your hands really bad on the door handles, but I finally figured out how to clean it -- Wheel cleaner!
BMW used to have a dash finish called "Matte Chrome" that was painted/dyed plastic that was possible to match with paint. A fellow on bimmerforums.com modded an 8" LCD (non carpc) like this and it turned out awesome.. the advantage of matte chrome!
You can see it on the right there.. sorry there aren't any better pics of it I can find.