Don't forget the Kodak Retina I/II/III. Look for a IIb or IIIc. They came with a range of lenses, but the most common ones are the Schneider Xenar f2 or f2.8. Look for one with the f2 lens. The b and c models have coupled rangefinders, and the IIIc has a built-in meter (although at this point in time it is 90%+ likely to be non-functional). I've got a IIb with the f2 lens and it takes wonderful pictures. It's small enough to fit in a coat pocket, but substantial enough to withstand bumps and dings of everyday carrying around. And the lens is self-casing when you close it up.