Of the Jamis models, the basic Aurora has lower gear which you will need in mountainous areas.
The Elite model has 30/40/50 which I found too high. Disc brakes are a big improvement over cantilevers in almost every way except weight and the Elite model has them nicely integrated with the luggage.
I used that integrated brake/gear levers (Tiagra) on my last rebuild but I would be tempted by a switch to older, less convenient bar end levers to help with:
Levers with longer cable pull.
Compatibility with MTB front mechs for easier shifting and spares support.
Better integration of bar bag and cable route.

LHT is probably the benchmark US tourer and I would use that for comparison in terms of price/features.
Does your wife need/want a step-through frame or lowered or sloping top tube?

50lbs is about my solo expedition load. 2 people should be able to travel lighter and anything you forget can be purchased.