When I was a working photojournalist I always carried a rangefinder for low level light situations, either a Cannon 7s, Leica IIIg and later a M4. I agree with Ian that none of these are as quite as a Rolliflex or a 2X3 Crown, but the advantage of a modern rangefinder is interchangable lens. I also carried a fast 90mm and 35mm as well as the standard 50. I had a Cannon 50 1.4 that was very sharp for its day. I still have a Cannon IIIg rangefinder from the 70s that is quite sharp, but without interchangable lens it can be quite limiting, I also have a Retina III big C with the two lens 35mm and 80mm, but there are very slow and the old external light meter does not meter in low light very well. I have not used the Bessas, but I did try the new Konica rangefinder, if I had the money I would get one with 2 lens. The motor advance was very quite.

Paul