i use the 139 quartz. it's built well, all the basic features, plus autoexposure if you have a particular f-stop you want to shoot at without constantly re-metering every object. i use the power winder too. it cost me about $100 for the body and winder. one of the best slr cameras i've ever used. super smooth, basic and well built. it's much lighter than the rts ones too. it only lacks a mirror lockup if you shoot lots of slow speeds.