I had some commuter/touring wheels built with 36H Velocity Dyad rims and Ultegra hubs, and they have been bulletproof. The deciding factor to me was the weight. Dyads are significantly lighter than Mavic A719s/319s. That said, my next set of wheels will have 32H DT Swiss 465 rims and Ultegra hubs. My mechanic says the 32H DTs are stronger than 36H Mavic Open Pros, and I trust him because he is a very skilled wheelbuilder with tons of experience. He built a set of DT 465s for a cyclist who rode across the US with them.