6MT and no Nav for my '11 M3
6MT and no Nav for my wife's '12 128i
We are both very happy about our choices. My wife was a little worried at first, but after she got the car she was very happy without the nav. Too much clutter, and if you plan on keeping the car for a while it will look dated in a couple of years. Not to mention repair costs if something goes out on it. If I need nav I would rather use my phone.