Aside from building a custom set of wheels, there are a number of wheelsets readily available:
1. Mavic Speedcity 700c 24H disc - about $450 and available with a Shimano or Campy freehub
2. Velocity VXC 700c disc 32H - about $300 and all black "stealth" look
3. Bontrager Select Disc Road 24H - about $300 but with paired spokes
3. Cane Creek Zonos 29 28H - more expensive but super durable with all their cool patented stuff
Hope this helps!