Hi,
the Surly LHT and Trek 520 are full blown touring bikes. They are intended to haul tents, bags, and stoves. They are a little slow. There is nothing fancy in the construction.

If you can throw a few more bucks at the situation you find Gunnar/Waterford. Gunnar is made by Waterford, and it's a sweet bike.
They don't make a touring bike, but the Sport can do lite touring.
I have ridden a Sport, and loved it. Waterford bikes are nicer. The construction and design are top notch. All Waterfords are custom, which makes them a very good value. They are great bikes. Their full blown tourer bike is an expedition bike. It's intended to cross continents. Notice the plural. It makes rugged bikes like the 520 or LHT seem wimpy. It's not all that heavy, but it's not designed for speed. They make everything from racers on down, but it's something to be aware of. Rivendell has a great rep. They get great reviews, Jimmy Carter has one. They are quite expensive. The pictures don't do them justice. They are beautiful.I'd love to try one.But I don't think they have a production tourer. And they use 26 inch wheels on some frames. I prefer a 700c wheel. Beyond that there are many other small frame makers. If it was my nickel, I'd go for the Waterford.