I had a Contax II withan f:2 Sonnar, and will probably have either another II or a meterless Kiev in the not too distant future.
Off on a tangent, my favorite 35 SLR is the Nikon F. The F came about by adding (oversimplification) a mirror box and prism to the Nikon SP, which was basically a Contax clone with a better shutter - the titanium one, although early ones had fabric curtains.
So the prewar Contaxes are not small cameras - if you want small, get the Leica screwmount. They're both gorgeous cameras in their own ways. The obvious solution is to have both.