You might also check out Rich Lesnik of Hands On Wheels in California. I weigh 370 and do a mix of road and dirt riding and he just built me a rear wheel using a Velocity Dyad 40-spoke rim, an un-branded but tough hub and DTSwiss spokes. I should get it Thursday. I haven't had problems with my rear wheel yet but I wanted to upgrade from 7-speed to 9-speed so this was a perfect opportunity to kill two birds with one stone. When finances allow, I'll have him build me a matching front wheel.
I will say I placed the order on a Monday and the wheel shipped the following Saturday. This, despite his website saying there will be significant delays for the rest of the month. Really good service!