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Yes, the XR31t is excellent in both rim and brake disc options. If I was sensible, I wouldn't have any other alloy rims. Get the asymmetric one for a Powertap, as the bracing angles on Powertap hubs are pretty appalling.
If the spoke lengths work for you then the XR26t (also available in an asymmetric model) would be another option, but I've never yet been in a position where some of my pre-used sets of spokes have been quite the right length for a new build. You may have better luck.
Kinlin XR31 is what it would say in the FAQ if we had one