I'd go with the DT Swiss GR 1600 if you just want something reasonably light (for a wide alloy rim) and bombproof for training / adventure riding. You can still order them from Merlin Cycle for less than MSRP ($500) in the grey market. I had to talk myself out of a pair.
Other options (all built in USA by the way):
$700 - HED Emporia GA (formally Belgium G)
$700 - Astral Outback
$600 - Spinergy GX (cool wheels, but a big gotcha on truing)
I'm kinda waiting to see if there is a sale on the HED or Astrals during the winter myself (why I didn't get the GR 1600).