I weight about the same as you and I have the cirrus wheels. they are very good wheels, at a very good price, and now they have 28 hole version, the cirrus light, for the same price.

However, for an ultralight climbing wheelset, I'd go with something like mavic reflex tubular rims, revolution spokes, and chris king hubs on a 28 hole rim and hub. man...that'd be light...maybe too light though.

so maybe a compromise? open pros w/ kings and revolutions? sounds good to me.