Black Mica with Sand interior (GT leather). Originally I wanted BM on black leather, until I noticed that there was too much black in the interior. Quite bland to say the least. When I saw the off white Sand leather interior, it hit the spot. The Black Mica paint have a lot of grey and gold Mica flakes in it, so there is a lot of depth in direct sunlight.
Unfortunately, there are cons to this combo. It is by far the hardest to keep clean. Black obviously shows more flaws then any other color, and will highlight dirt and swirls/marring. The Sand leather interior will also highlight stains, especially jean dye stains. I have to wash the interior and wipe down the interior on a bi-weekly basis.