coelacanth
Ride, dive, shoot.
I don't like loading the M6, I know I'm not expert on the body, but it is a pain to load.
Probably you've already tried and still disliked it, but if you haven't, you might be surprised how easy and quick M6 style loading is. It's completely different animal from infamous Barnack (screw mount) Leica's bottom loading, and newer Ms have very quick loading mechanism compared to older M3 and M2.
Bottom loading is, at least for me, a lot easier and quicker to do when you are standing or even walking around. I choose M6's bottom loading over Bessa's every single time. Just a thought.