How about using a Hasselblad back with Phocus and Phocus Mobile?
I love H bodies & lenses, but I love Phase One & Leaf backs. The biggest issue for me though is the lack of options with the newer Hassy systems (H3/4/5). You can't even swap Hassy backs between bodies, let alone use other manufacturer's backs.
If Hasselblad continued to make backs that supported the H1/H2 platform I probably still would have went that route though. They don't even have an option for the H4X (which I plan to upgrade to at some point). That leaves me with Phase One and Leaf (which is now owned by Phase One as well). Also, I like using Capture One over Phocus (especially since version 7 was released).