I've owned my M3 for almost 2 years and I dread loosing it, but I'm afraid a car seat is not going to work too well in this car. Car has amazing handling - I was told a while ago that the best way to find your car's slipping point is to go to a wide-open parking lot after a rain and try to spin it out. It took going 45 and JERKING the wheel to do it! The M3 has sneaky speed, like a slingshot. Once you get the RPM's up to around 4500, hold on. The Japanese vehicles may get you off the line, but they're dust in the 1/4! Overall a fun car that I'll badly miss. BTW, this is also a much more practical car than it gets credit for. Go ahead, take the jump to M3.
The handling on back roads when going over 80mph is uncanny! I've never felt safer in a vehicle.
The doors have a tendency to want to close on your legs. The split climate control is pretty useless.