Listen, you should get blacklines. Your current setup is already really nice; can't go wrong with the M-Sport kit. However, blacklines would reduce a lot of the attention that the red in your taillights create.
E92 335i: Space Grey|Coral Red|Aluminum Trim
Hold out for the BRZ STI or... Rocket Bunny FRS. Update: Scratch that. I've got a 2015 5.0/6MT with my name on it.