Although I don't like the stickered-up look, I am happy with the quality of DT Swiss rims. Most wheelbuilders I've talked to agree. Velocity aren't as true, but still build up fine. Mavic have a decent number of failure reports, but that's largely because of the great number of them on the road. I guess I don't think about it. I'm more interested in the person building the wheel than the specific components.
I'm fairly big at 200lbs, but I don't seem to have much trouble with wheelsets. When I do, it's factory-builts. A trip to the local wheelbuilder for a proper tension has settled them all down properly.