X I will be driving an M4 tomorrow and possibly an M3. I will pass what I can after I get back from Frankfurt area. The M4 is the target vehicle overall but I am keeping my mind open. There was a member here recently who has a black M3 and posted about it on this Z forum!
Possibly hit search and gather his feedback.
Also this -
BMW M3 (F80) and BMW M4 (F82) General Forum - BMW M3 and BMW M4 Forum