how about we go back a bit first.
Do you presently own a touring bike, if so, which one?
It it is a stock model, generally the stock wheels will be fine for touring with stuff on the bike, but lets get this question out in the open first.
Also, if you are of average weight and plan to carry an more or less average 30, 40lbs of stuff on your bike, then a reasonably priced set of wheels will work fine.
Oh, 700 or 26in wheels, or something else?

Enquiring minds want to know (and it will make all the diff in the answers that will be helpful)