Another option if to get your windows tinted. Arizona allows any darkness on the rear side windows and back glass, and no darker than 33% on the front side windows.
http://www.tintcenter.com/laws/AZ/
10-20% on all the rears and 30-35% on the fronts would help out tremendously, imo. It will help keep the interior much cooler, block around 99% of UV from occupants as well as the interior surfaces which equates to better longevity, and generally improves the appearance of a vehicle.
Just be sure to do your research on shops and types of tint films they use. Ask a lot of questions before committing to any one shop.
I just got my V tinted this morning and could immediately tell one heck of a difference.