So I don't know about the desert, but I can honestly tell you, I live in the north east, and I got boned when I purchased my car because I got the FWD, and was not told about an AWD being dropped off at the dealership 2 weeks later. Can you say ****** much?
Either way, my car handled pretty damn good with the snow we got up here this season. We didn't get pummeled, but with it being just FWD, I was able to haul *** through up to 9" of snow and maintain pretty good control.
Personally, if you always have good weather, I would request to have a FWD one sent over to you. I'm sure they will waive the shipment fees. Let me know if you end up getting the AWD or not, because I am possibly moving from RI to NM and if it is TRULY beneficial to have the AWD out in NM, I'm going to see if the dealership there will be willing to do a trade of some sort.