If you buy wheels with cartridge hubs, it'd be a good idea to know who can/will service them. White Industries does have links on their site to service instructions for both front and rear hubs.

If budget is an issue you could look at Wheelsmith's XL14's for front and rear NDS. (I've got a front wheel with 28 of them, but I'm only 155 on a heavy day and my sprinting days are behind me.)

Rob at Psimet would be a good source for info re spoke count with light weight spokes. He's right up front about tending to be conservative. I'd tend to go with him for a White Industries build.