LX/XT on the rear
The crank depends. What kind of gearing do you want. A road triple's gonna be able to run bigger gears, which is not really an advantage in most touring situations. A mountain triple can run a very small granny, which can be helpful. The disadvantage is that some road front derailluers may not be able toi handle the smallest grannies.
I'd just go with an LX/XT crank. Note that you'll probably need a new BB if your crank's from 92.