One more item to consider is, the battery. I agree with JeromeE. that one who shoots L/A almost always will consider a tech camera at some point. With a Phase 645 DF you can shoot with AF and the choice of leaf or focal plane shutter @ 1/4000 sec. This way you can capture fast sports and high flash synch with appropriate lenses and then swap the DB to any number of tech cameras without the need for a tethered battery. I think the Phase 645DF is the only camera besides the S2 that offers two shutter options.