I have been using a ProClips console mount (part # 833597) on my 335i for several years, and it is exactly what I like.
Unfortunately, ProClips does not have a custom mount for the M4 coupe yet, or for the 435i for that matter. My two choices if I stay with ProClips are either a vent mount (that partially covers one of the air vents), or a universal adjustable center console mount (not sure it would fit properly).
Has anyone used either of these mounts, and are you, or were you, pleased with them? Does anyone have an other mount suggestions, perhaps from a different company?