Hi marmot and welcome,
In order to help you better, let us know the following information:
1. Your overall budget, roughly, to start with
2. What equipment you already have: current bike(s), racks, panniers, etc that may be used
3. What type of touring you want to do: fully self-contained, supported, credit card touring, etc
4. Your intended touring for your next season: geography, routes, length in days, whether on or off road
5. Your body build, general condition and any special needs or physical limitations
All the bikes you mention are possibly ok for touring under different circumstances. It all depends on how you intend to use them, how heavy you are, how much you are carrying, etc.
My 2 cents: like cyclebum says - fit is first. Don't go for price alone because you are "married" to your bike on a long tour. And bikes are cheaper than chiropractors no matter what. Have you also visited crazyguyonabike.com and looked at the journals already? Great resource also.
Tell us about your experience level. Have you done any touring already, even just overniters, etc.?
Again, welcome to this fun place.