Yup, those are my choices.
There are two kits out there that I am looking at getting. The first the the Mamiya DM22/DF system and adding the Schnieder 80mm LS coming to about $12480. The second is the Leaf Aptus II-5 kit which includes the Phase One DF body and that very same Schnieder listed at $12990.
I have yet to demo either of these backs, and given the similarities between the two bodies and backs, I'm surprised I couldn't find any information comparing and contrasting them. So I turn to you, the all knowing populace. What are the differences that aren't listed in the spec sheets?