I have a friend who's having the Rolf blues. A month ago the hub packed it in, this week the rim is showing cracks on many of the spoke holes. He has a rear disk that he thinks might have contributed by putting extra stress on the spokes. We ride in terrain that can have steep descents with stop signs at the bottom. So he's looking, too.
So . . . I like my 36H Deep V rear rim on CK hub, 145mm. Yes, very little dishing, reasonable spoke tensions, very reliable wheel. Never a problem so far. 310 lb. team, rim brakes, 15-14 DT spokes.
Anything extra to think about for a disk rear, wheel-wise, other than the disk mount? He'll need the hub shipped next day so we can ride together next Sunday. BikeMan.com? Webcyclery.com? Other source?