Rotating weight is moot, but Dura Ace hubs are much nicer than the Novatec ones, especially at the price you seem to have found. Plus, I always figure more spokes for the same weight is a good thing.
One thing to note about the XR-200 is that some people report them as being noodly, both when building and while riding. I don't have personal experience, but it depends on how stiff you want your wheels and how patient you can be while building them.
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