I test drove the AWD M3 and P100D MX to decide. Both hit hard enough to make me feel sick and upset most any passenger. I went with the AWD. For the typical driver, it is a choice between the fastest, most responsive car you've ever driven and one that is even faster.
In my younger days I built a very fast 1st gen Camaro. It would burn both tires shifting at 60 MPH and would slam you into the seat when you hit it. The AWD M3 is faster than my Camaro was.