I once toured on a Reynolds 520 frame, and the frame wiggled when I toured. I won't say who made the frame. In defense of the frame, I weigh over 200 lbs, so maybe my weight and the weight of my gear, was too much to ask. Reynolds is being vague about their tube set properties right now, expecting you to know how to interpret engineering specs. I could swear that Reynolds used to say that 520 and 525 (same alloy, one is licensed for manufacturing in Asia) should be used for light applications only. I read that as don't use it to build a touring bike, and don't use it to build a tandem bike.
So the Jamis Aurora Elite is a strange animal. It has that Reynolds 631 frame, it is equipped for club rides, and Jamis sells it as a touring bike.
If you could buy the Aurora Elite frame and put the Aurora build kit on the bike, you would have something. If you could get a custom build kit and the Elite frame you would have something. Not mentioned, beside the limited cassette selection for 10 speed, 9 speed is a lot tougher and that is why you see few 10 speed mountain bikes.
I have a friend the rides a Cannondale T-2000 (now called the Touring-2). It is in the same price range as the Aurora Elite, and has mostly sensible components on it. The Cannondale touring bikes have that shorter wheelbase more nimble ride. So far Cannodale has stayed true and not bastardized the bike with a cheap Chinese made carbon fiber fork.
So perhaps a Touring-2 would be a good alternative.