Odyssey make a great battery, but it requires huge charging currents when depleted to 50% and the owners never bother to meet this need.
And Like all Lead acid batteries, but especially AGM, they need to be fully charged as often as possible, as soon as possible
Optima batteries have 25% less capacity than a rectangular AGM battery. That 6 pack design orbital design does not make for any magical properties, or make up for the lack of Lead. They are well marketed however.
Unless the OP absolutely requires an AGM battery, I think they would be best off financially with a Wally world marine battery.
If an AGM is absolutly required, Goto Costco and get one of their Duracell AGM batteries, they are a rebadged Deka Intimidator.
If the OP insists on having a bragging rights top $$ battery, Northstar, Odyssey, Lifeline, but all of these will be murdered my too little charging current, applied too seldom and for too short a duration, Just like every other lead acid battery. They will just cost a lot more to replace, and the owner needs to realize their rather insane price tag does not make them immune to abuse.
Batteries+ sell a rebadged Northstar AGM battery as X2 power.
My Northstar Group27AGM is performing very well closing in on 2 years and about 175 deep cycles, but I can charge it properly.