I'm planning to buy a set of touring wheels soon, probably Velocity Dyads or Synergys laced to Velocity or Ultegra hubs. The rims will be 700c, 36-spoke but I'm not sure whether to get butted or straight-gauge spokes. It seems that all of the experts recommend butted spokes, but my current mechanic and other mechanics I've used over the years all seem to think that straight spokes are more durable.
I plan to put these wheels on my Bob Jackson World Tour that I use mostly for commuting, but I would like to do some occasional loaded touring. I generally use 25 mm tires for commuting, but may jump up to 28s and would get some 32s for loaded touring.