I have IRD Cadence Niobiums laced to 28 hole custom White Industries hubs. Front radial, rear radial and 2x. Michelin Pro3 Races (like andre says) with Michelin SL tubes. Haven't had to true them yet, one year after building. They're super light and sturdy enough for my 32 mile RT commute about 4 days a week. I've hit some potholes and regularly hop curbs.

The rims are finicky to set up, but, if you are a patient and experienced wheelbuilder, there's no reason not to run them. I have a road wheelset with pretty much the same specs. They have significantly less time on them, but seem to be holding up just as well.