Interesting discussion since I'm tooling up for a couple bike's worth of wheelbuilding soon. The proposed specs are what I want, also.
Has anyone tried the Soma Weymouth?
Weymouth Rim (700c & 650b) | SOMA Fabrications
And to those of you who have tried several, what's the justification for apparently identical rims: Sun CR-18, Velocity NoBS, Soma Weymouth; having a 2:1 price differential?