<p>I am looking to enter in the medium format B&W world; I have been shooting 35 mm SLR for quite some time. I am interested in 6x7 format and I know what I mostly do street photography (travel), classical music concerts (indoor activities in general) and some landscapes. It seems that the preferred system would be a rangefinder or SLR (such as Pentax 67, or Fuji), but it caught my attention the SLR waist finder systems such as Mamiya RZ-67, RB-67 or Bronica GS-1, but all looks pretty big and heavy. I know camera advice is very subjective but I would greatly appreciate any comments. Also does anyone know a link or have a photo where I can see side-by-side size images of the aforementioned cameras so I can get a good size idea </p>