I have the Day-1 windstop pants, with weather check waist in wool asat. Very nice pants, durable, comfortable, and VERY warm! Pockets are all laid out nicely and I love the weather check waist. Probably too warm for Az.
I also have the FirstLite merino wool Llano, and Labador sweater (both in asat). Very versatile clothing. I can wear one llano in warm temps (50-60degrees), as the weather drops I add another llano, then as it get colder I add the Labador sweater. I would check out the First Lite Gila pants in wool asat.
chris <><