I would like to do some carbon-fibre work, in two minds about it.
Thinking some engine bay styling would be nice, thought about replicating the 128i performance air-intake on my 135i by hydro dripping the intake and and placing a BMW performance sticker over the top.
Exterior wise i'm thinking performance spoiler, splitter and diffuser in CF, would add good contrast to an all jet black car.
Here's a picture of Supergnats? car as an example.