What is your opinion between these two camera bodies and their systems? I will be using it mostly for documentary and landscape photography. THe Mamiya system looks pretty solid, but the Pentax seems to have an ergonomic edge (and is less expensive on the used market). I'm strictly talking used. The things that are important to me, among others, are: Viewfinder: quality/brightness/snap/magnification and built-in diopter adjustment are the primary concerns (removable prism isn't needed); split- image rangefinder is nice Power: AA batteries would be the best Metering display: preferably a bar-graph type layout in the viewfinder Noise level: Quieter is better, but I want auto advance (which is noisy by definition) Lens selection: Not overly critical, but leaf shutter lenses are nice to have sometimes for flash (and maybe to reduce noise) Finally, I understand there's been a debate that Michael Reichman apparently settled on the Pentax's lack of MLU. I'd appreciate your experiences with one or both of these camera bodies and systems. i think the two are a fair comparision. And how about pricing? Used. Thank you.