This thread would probably be better off in the suns forum.
Anyway, I grew up in Phoenix. Its a great city and has some of the nicest school districts in the country (at least that's what I was told attending school there). The summers are really hot, but the winters are very mild, and you get some of the best sunsets in the country. It's not gritty like the super metros NY and LA, everything is nice and clean. What district would you be teaching in?
You should check out the city before you decide, if you have the chance.
edit: I also hear they have a pretty decent basketball team