Jim,
I know you posted this some time ago, but I just now ran across it. I've gone down exactly the same road as you regarding rangefinders. I can easily say that I could have written your post word for word. And I'd add one more issue... rangefinders viewfinders are a pain in the a** for glasses wearers. With the affordable Leicas and Bessas, you can never experience one of the key rangefinder benefits... seeing outside the frame! Not with the widest frame offered by the particular model. The only RFs I came across that gave me that pleasure were the Zeiss Ikon ZM and the Hexar RF. Maybe the Leicas newer than the M6 do that too, but that is WAY outside my wallet.
So I'm about to sell off the rangefinders... I'm tired of chasing the holy grail of RF. Too expensive and unsatisfying as a useful tool. And now that small digital gear has come so far, I think I'm ready. Good luck with your decisions and may they be painless. 🙂
Jamie