The Trek Soho is a very compelling item. I love the drive train. For all weather, it should be less troublesome than a chain driven bike. My only dislike is the handlebar. I like drop bars but, I would have to consider the Soho for a bad weather bike. All that's missing is a rack. You don't have to take it on a 3 hour tour for warranty service.
Your road/light touring bike: Once again the MEC dealership distance would be a consideration for me. My one bike is a cyclocross with an Avid BB7 on the front. I hate rim brakes. The Kona will be a lot easier to get serviced when needed. If the various bike shops all offer good service, that round trip to MEC would give me pause.
I would need to know the life expectancy and cost of th belt for the Soho. That could be an unwanted surprise.
Decisions decisions!