Booker:

Thanks a lot, that helps.

What I plan to do is mostly doing yo-yo style skiing in the Northeast
(at abondoned downhill areas, old CCC trails, etc.). Your comments tip
the balance toward the Pure, as I really want something that feels as
natural as possible while climbing and doing approaches. (Plus, I get
a deal on Pure, but not the others, so that helps...)

My only substantial experience on rando set-ups is with the Naxo, and I
kind of liked it--but of course I was mostly following a guide's skin
track. But my intuition tells me the Pure will be better, somewhat
based on the massive improvement in nordic racing gear we all
experienced when the pivot points of the boots were moved back a little
bit.

Best wishes,

Jon