FWIW, I've resisted the 'Blad after my non-TLR Rolleiflex MF failures. Rollei's non-TLR's (with possible exception of SL66 which I didn't try) were just too fiddly and undependable.... indicating why pro's preferred Hassy's. Yes I loved the lenses for the 6008 that rumored internal Zeiss designer comments noted were better than their Hasselblad equivalents, and love the 6008 when it worked... and the sound of it's shutter - like a Mercedes door! - but in the end the backs were something of a nightmare and I let it go. Mild regrets? Not really.... more that I didn't pick up a Hassy at the first instead. So I still am scarred by the whole external back Rolleiflex problems.... and boy do I know the issue of interlocking lock-ups if you aren't careful. I still have my 3.5F TLR... though as much as I love the silent shutter and the shots, there's something about the film path I'm wondering whether it just picks up more dust.... even after a CLA.... than with my Pentax 645N. The P645N is a great and under rated camera... and pretty much covers the walking around camera thing for me with film.... so that my thought is eventually to dump the rest of my 35mm gear (keep my Fuji X series digital instead) and work in 4X5 and 120 for film.... where the film choice and ease of use with 120 offers a balance to the science of 4X5. Digital is work... production, all that. Film is for free time.... 'cause the analog-ness is just a good and wonderful thing... even if it can be painful as well. And who knows, maybe the 4X5 eventually slides....
But now with my "back to film for the joy of it" moment, I'm thinking of trading out the rest of my Fuji GFX gear for a Hassy V series, too. Yet I hear Hassy's require reasonably regular service... and that's kind of a "where in 2023 and on..." will that be available? Curiously, I'm seeing in some cases that 501CM bodies can top the price of 503CX's.... and after Steve's comments on these two, I wonder if he bumped the prices up.... or if that's just an anomaly? I very much appreciate Steve's comments on diopter adjustment.... as a geezer myself. Move to pickup a P645N represented something of a bow to AF's pluses and built-in diopter adjustment, too.... EVEN though I still read and drive without specs. But that said, sometimes the size of the print on a camera or lens means you gotta pull out the specs!
Also appreciate the advice for what is it? A12 Type III backs as "more reliable" (certainly more pricey!). And hadn't expected to hear anything about the dark slide! so that's good to know. The 50-80-150mm seems a good set, but there's no rush in any of this IMHO, and one-at-a-time is fine.
Rental trial seems a good approach to confirm whether or not any of this might be a good replacement for the TLR to keep a 6X6 in my life. And I'm saying this after scanning some 6X6's I'd taken this summer before picking up the P645N... where it's the framing and the shots ...if I don't say so myself, some damn good shots! I like the 645 frame, too, and the lighter camera the Pentax offers, but why just one? Bigamy with cameras isn't forbidden.... even within the "same" film size.