The H2 route seems like its not the way to go.... I cant seem to make it work so that its justifiable to me. I end up with another system with another set of lenses... part of the desire for a back for the 503 was to keep my lens investment (not huge, but not nothing either).
I looked at the 645D, which is affordable, and has an affordable lens selection, but it seems like the longer term reviews are pretty mixed. And then again I would be into another system and another sett of lenses.
Looking at the GFX and X1, this might make more sense, since I can adapt a lot of lenses, as well as my Cambo Actus and consolidate my gear a bit. The GFX and X1D also look like it could potentially replace my A7riii for most of my client work (architecture and product) - especially with the Actus.
It also seems like I can use some legacy glass with the GFX and the X1? Even 35mm glass?