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.
Past:'08 E92 335i|ZPP|ZSP|6AT|four (4) HPFPs
Present:'15 Mustang GT|401A|PP|6MT|Recaros
Sig pic unrelated. I like to go sideways and stuff.