When Orange used WTB Speedmaster rims they had some terrible reviews. I couldn't understand why, but when journalists say a particular type of rim won't stay true, no matter who builds/rebuilds the wheel, it just makes you wonder. To me, if you build a wheel properly it should stay true, and I don't understand why the nipples would loosen from the spokes with one type of rim and not another, but that's what they said. I've never built a wheel with a WTB rim, so I can't contradict, but nor can I understand it.
I didn't mean to suggest that all Sun rims were hum drum, far from it, just that a CR18 is a budget rim compared to the CR17. I don't think the difference between the two is as widely appreciated though as the difference between the Mavic 221 and 517.
Nuke Proof hubs were expensive, but had a reputation for being fragile (the opposite of the name ironically). You would expect to see them built into top-level rims though.