If great price = $475-550, then you have a bunch of options
Hope Pro II hubs x any rims you want (stans 355's for light)
White Industries M16 hubs x any rims you want (stans 355's for light)
Go to Notubes, they have a WTB x 355 29er wheelset for 475 thats pretty light.
I would decide on what type of hubs and rims you want and let someone build up a custom wheelset for you. Call up Mike Garcia at Odds and Endos and tell him your budget and what you want. Or try lacemine29.com