I have my first rangefinder it is a Bessa II, Voigtlander, circa 1950's. It was a great buy and the fact that it folds up is wonderful. If you go tis route look for one with the color skopar lense.
as a 120 that is 6x9, you only get 8 shots but i find that I am much more specific/intentional in my shooting, which means one slows down...