My current 26" set for touring is Velocity Aeroheat, and my current 700c are Velocity Dyad, same extrusion different name.
While I have profound respect for the opinions here, I actually check out my options by going here:
http://www.peterwhitecycles.com/velocity.asp
I don't necessarily follow his advice to the letter, since he has some idiosyncratic opinions, but it is a one stop shop for wheel info, I then buy the stuff I finally decide on wherever, and drive on. I used to spend a lot of time in NH, and it would be cool to be able to get the stuff from him, though I am not sure he wants drop ins.