14g Wheel Smith spokes. You will never go wrong with these and because they are so common, if you break one, you can find them at almost any bike shop.
This client opted to go with the Power Tap Pro+ wireless system. Its easy to use and a strong measurement of progress. Nothing will keep you honest like power, because a watt is a watt, no matter how you are feeling.
Mavic CXP 33 rims have become the industry standard for quality and reliability. I've used them for years and so have many of the riders in and around our area. I keep having to call Mavic back to re-up on our supply. They don't hang around very long.