Salsa Vaya is the best touring bike for me because that is what I have.
I could tour on my CoMotion Speedster tandem if I changed the rims to a rim made for tandem touring.
There are alot of options and the only way to get everything you want is probably to build one. Buying a complete bike you can get some nice bikes for the money you are looking at but you will probably want to change something on it.