yeah, the 3c is great for az. i am on my second set with stans on non-ust 325 (i think) rims.
here is the weird thing....if you run 3c tires with stans (i just mounted a new one a couple of days ago) you will likely notice some dark purple/black fluid coming from around the rim where the bead seats. i talked to my LBS and the wrench (Fish) told me that it was the Stans breaking down the rubber of the tire. it was enough to drip onto my garage floor, not a lot, just a couple of spots. he said that it was nothing to be concerned with. i thought i was leaking brake fluid at first. just wanted to give the heads up cause i mildly freaked when i saw it, thinking my brakes were shot.