Juan Valdenebro
Truth is beauty
Why not the Olympus OM-2 or Om-2n? The big advantage of the OM-2 over the OM-1 is the change to a SR-44 battery which is widely available.
I bought an OM-2n for $50 and a 28mm/3.5 Oly lens for $30. A 50/1.8 will be dirt cheap as well.
The size is another advantege of the OM. Attached is a photo that compares the OM to a Leica M3.
I think the most important measurement of a camera, if we talk about size, is its thickness with a lens on, because that's what allows it or not to be placed inside a pocket or any other place... From that point of view any SLR is huge compared to RF's. My RF's are 50mm thick with my 28 3.5 and 60mm thick with my 40 1.4... My SLR's are miles away.
Cheers,
Juan