Well, the Handsome Devil is not a geometrically exact copy of the X0-1 like the XOXO is but it seems like a solid option that would take 650b's if desired.
One another note about the bike....I've never owned/ridden (except some Rivendell Demo rides since I live in their town) Moustache bars. Are they all that or are drops the way to go on an all-rounder like this?