Carbon Black all the way...just wait for the M sports package.

Black at night and metallic blue by day. Have it on the M3 I am trading in for the X5 (Space Grey). Had I even known about the carbon black coming along, I would have waited to place the order. Oh well, when the 3.0d makes it to NA, I'll go back to it.

If the choice is between blacks...I would go with Jet black, much richer, glossier when clean. The metallic seems to mute the deep lustre that a black car should have.

IMHO.

Tough choice!