I decided to go with grey! The red ones - while they look fantastic - clashed a bit too much with the extended Fox Red dashboard. I think red would suit a black or grey interior perfectly, or even a non-extended FR.
The grey looks so right, a nod to the E46/E39.
I also got a new redline overlay to match the 8600 RPM customized tachometer face. Now it's perfect!
These updated versions have white adhesive backing, which allows the original light output and does not suffer the dim issues of the original batch.