It all comes down to the individual when it comes to the noise. Usually hens make noise at egg laying time or when they see you and expect treats. I've got one that follows us everywhere talking the entire time (Speckled Sussex).
For the sweltering heat of Phoenix, I would strongly suggest a light-bodied breed like a Leghorn - my larger heavier feathered breeds suffer heat stress starting around 75-85 degrees. There are varieties of Leghorns too - California Leghorns being one. You could poke over to the Arizona thread to see what people in your area recommend. Heat stress is a killer - chickens radiate heat by panting, spreading their wings out, through their combs and their legs - the rest of them is covered with feathers. All they can do is work their hearts extra hard to try and shed heat, so picking a chicken suited to the area is very important in your environment.
Predator protection is important everywhere but when thinking about your coop and run, let paranoia rule the day. Hawk net over the top of any run and especially using hardware cloth anywhere you'd be tempted to use chicken wire- and electric fencing for the exterior for the coop/run.