[Germanauto]

Personally I'd wait and see what the new M3 offers. If you find its face bearable then I think it could be a solid replacement. The 3-series keeps growing so it will be spacious enough, I believe it will have the same AWD/RWD system as the M5, and it will be lighter and more engaging than the M5.

I'm not sure what you meant about the F80 chassis appealing to a younger crowd. Do you mean the buying demographics or ride quality/NVH? I'm sure plenty of M3s are owned by the 40-50 crowd while the M4 might be a little younger. It's way more refined than the E9X chassis was which to some is a plus, to me it's not.

I'm also an M2C fan like some of the other posters here but it comes with some drawbacks. It's small, 2 doors, not very luxurious, and only comes with black interior.