I have most of the cameras mentioned; the OM-1, OM-2n, ME-Super, MX, ME, Spotmatic. One more I'd like to add to the discussion is the Minolta XD11. It's about the same size as the MX and OM (the ME-Super is actually just a little smaller than the MX), but has an incredibly reliable meter. It also has Aperture-priority and Shutter-priority. This was the first multi-mode SLR and it even had a program mode of sorts; if, while in shutter-priority, you set the camera in such a way that would result in an improper exposure, the camera will shift the "program" to a setting that will properly expose the scene/subject. It's a fantastic camera, which also shares the basic chassis and shutter with the Leica R5 and a couple of other Leica R-something models. Plus, Minolta's Rokkor lenses are very inexpensive but are incredible performers. I love my Pentax cameras, especially the MX, and I love the OM-bodies, but the XD11 is one of my all-time favorite cameras period. Definitely worth taking a look at.