Just my opinion here as this is obviously a matter of personal preference. In the RS, orange is mixed with the huge rear wing that is black, the decals that are black, and the wheels that tend to be black (exactly like the Techart Turbo that Stradale posts above--but this means more $$$ and even so it still doesn't look that great with this car).
In the Turbo, to my eyes, orange does not look right. First, it's "too much" orange
, especially since the rear wing is also orange. Second, this is not an aggressive looking car like the RS; color and car simply don't "fit."
My vote is black/natural, cocoa/white, black/black. If you like cocoa, white and cocoa is an exquisite combination; I've seen it a few times and my heart always skips a beat or two when I see it.
Good luck and have fun ordering your car.