As crazy as it may seem, I'd like to yank the OEM spoiler and replace it with the NISMO wing. Hopefully it's possible to do so without revealing screw holes. Else, it'll be a good excuse to get a painted CF hatch.
Anyhow, here's my contribution (thanks to GIMP). I will probably have someone paint the lip and fangs as well as the lower rear bumper matte black.