Personally I don't find carbon wrap very convincing. I want to get my spoiler wrapped dark metallic blue, as well as my mirrors to match. I saw someone do that with green wrap on a white 2 and it looked great.
I'll be doing gloss black wrap on my roof but I don't have a spoiler at the moment. I haven't decided yet if I would keep it blue or wrap it black if I got one eventually. I already know any other body additions (lip and side skirts) would be black