I did some research on the forums here (clyde, mechanics, touring) and I built my own set using Velocity Deep V's
(may not take as wide of a tire as you want though) using 36 x 3 pattern with double-butted spokes. The Velocity Dyad
was also recommended many times in the touring forum and can take a much wider tire. I am 210lbs and I started breaking spokes on old wheels so I wanted something tough and cheap and consistently ran into "use 36 spokes and a deep V rim." You can find good deals on spokes on the web and find a reasonable hub
. The link is for regular hubs though, I don't know anything about disc brakes.
Not disc, but I bought these
for my commuter. 700 laced to MTB hubs, 36 spokes. I tightened up the tension a little bit, and you cannot beat the price. They have some really good deals on that site, but all the disc hub wheelsets I saw were 26". Would a disc 29er work?
I would think you could build them yourself much cheaper than $430. Can you reuse your current hubs? That would put the price under $200. Lots of great sites (and info here) on wheel building
and my set hasn't fallen apart yet, but I've only got about 200mi on them. Another good site.
All in all, I've read many opinions that some type of Velocity rim will be extremely durable and more cost effective.