Hi Chi,
As you may know Arizona Premium (mattresses.net) is one of the invited members here which means that I think very highly of them and they compete well with the best in the industry in terms of their quality, value, knowledge, and transparency. They make some very high quality component latex mattresses and latex is the most durable foam material in the industry so there certainly wouldn’t be any durability issues with any of their mattresses.
The better options and possibilities I’m aware of in the Phoenix area are listed in post #4 here. You are fortunate to have so many great choices in the area.
There is also more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you make more meaningful comparisons between mattresses.
I’m looking forward to finding out what you end up deciding … and of course any comments or questions you may have along the way.
Phoenix