Im looking for a single purpose camera, night time candids/street photography. It will only be loaded with TMAX 3200, ideally with a 35mm lens. Options in mind (leica is too expensive).

Bessa ? w/Voigtlander 35/1.2
Nikon FM2N w/Sigma 28/1.8

are there any medium format rangefinders with fast lenses? The advantage being I could push the film more without noticing the grain.

I am a Nikon user at the moment, the FM2N does make some sense, except, that since my digital lenses dont have aperture collars, they wont work on the FM2N anyways... so I have no problem buying into a different system for this one application.