wellllll since you already pulled the trigger on a rohloff you might as well do it right. Surly Big Dummy.
That bike with a rohloff would be an ultimate commuter/utility bike.

Don't go throwing it in some cheap bike,a $1,400 hub does not belong in some cheap mtb frame. Do that hub well.

The Steel Wool Tweed is a pretty nice frame, if i hadn't gone with my cross-check i would of went with one of those and it's not that pricey.