Brian, I've not looked a whole lot into the Rohloff compatibility issues but I do believe the Surly Ogre and comparable Troll will take that system in 29er and 26er sizes respectively. Both of those bikes are designed around flat bars if I'm not mistaken but I haven't poured over their geometry and sizing specs.
To get my wife's perspective on her Fargo have look at her blog entry. It's mostly a short review of her Jones handlebar but does give some of her impressions of the bike fit and such on the Fargo. You can also see what her body positioning on the bike is like.
http://faroutwanderings.blogspot.com/2013/05/jones-h-bar-review.html?m=1