I have been very pleased with AGM batteries. They cost considerably more then lead acid, but their extended longevity, lack of outgassing (no corrosion repairs), and extended warranty, normally more then offset the price difference.
If you search through the various threads in this forum, and the Newell Coach web page tech line, you can find considerably more information about the advantages of AGM.
I purchased new Lifeline 8D AGM batteries coach batteries locally in Southern California. They are heavy enough that shipping would be pretty stout. I would look at this link for locations in Arizona although none appear very close to you.
After pricing them locally you can compare that with the online pricing with shipping.
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Michael and Georgia Day
1992 Newell 43.5' #281
8V92 DDEC-2, HT740
PT Cruiser GT with Remco Transmission Pump https://newellowner.com/newell-photos/