Hello,
Part of the problem is that most "serious" 35mm rangefinders are either Leicas or cameras designed to take Leica lenses: Voightlanders, Canon, Soviet RFs, etc. Only three exceptions to the "Leica clones" come to mind - Contax, Nikon and the Minolta Super A.
I only own one serious "non-Leica type" rangefinder and it is perhaps my favorite RF although not the most used: the Minolta Super A.
I own and often laud the merits of my beloved Minolta Super A. It was originally designed to compete with the M3 - orginally designed with an M mount, actually (prototype was called the Minolta SKY - imagine what the RF world might be like if there had been third party lenses and bodies from day one... RF might not have gone the way of the buffalo...). Patent issues forced Minolta to come up with their own mount, which means the lenses it takes will only work on the Super A - and only Super A lenses will work on the camera.
The camera is VERY well built - sturdier than the CL or CLE. It is essentially a Japanese version of the M3 and is built to similar, if not identical standards - as close as a Japanese camera is going to come to German specs, anyway. It has the same heavy "brassy" feel as the M3 when you hold it and shoot it. I like that, very much.
I only have the 50mm, f/2 and 35mm, f/3.5 lenses for it. They are as good or better than the LTM Leica equivalents I have used, but not up to the standard of my Summicrons. The lenses do not have the same standard of quality finish as Summicrons either and don't seem up to the same buiding specs. My guess is that by the time the "additional" lenses were produced, Minolta knew it had a marketing disaster on its hands and didn't put the energy into it they did into the original body and lens set.
The light meter for the Minolta Super A is MUCH better than the M3's meter - although not as cool looking. And there's not a "newer" battery operated version of the meter either.
The Super A is not rare, but not something you see for sale every day either. When it does pop up on ebay, it either sells for nearly nothing, or if two people get in a bidding war can go for quite a bit. I haven't had much luck locating the 7 lenses Minolta designed for it. There were three 50mm models, a 35, 135 and a few others (would have to check a brochure at my house to be certain - and I'm halfway around the world from my house at the moment).
Too bad Minolta didn't continue the series. They moved "down" the chain to decent, but lesser cameras such as the 7, 7s, 9 and 11. Bigger, less sturdy and with non-interchangeable lenses. The 7sII is the height of that series and I highly recommend it if you want a small, inexpensive (around $75-$100 before a CLA).
But back to the original comment I made - the reason the group "mostly" discusses Leica is that with this exception and the Contax and Nikon bodies out there - pretty much everything else IS Leica or Leica-related.
Jeff M