I don't want you to lose your mind, so I will offer up a suggestion
You may not be aware, but Deka/East Penn relabels their batteries for many retailers, including Sam's Club, O'Reilly's, Batteries Plus, BPS, and several others. You are 15 minutes from a Batteries Plus in Orange CT. They carry a 27 series Deka AGM for 219 dollars. Order on line, pick up in store, and save 10%, and there is also a 10 dollar mail in rebate, so cost is 190. Good deal for that AGM. Same battery as Sam's Duracell, but you are paying a little more at Batteries Plus. They also carry the group 31 if you want it.
Of the batteries that you mention in the post above, the Northstar AGM is the highest quality IMO. Fantastic for cranking, but overkill for the troller due to the expense. If you want though, Batteries Plus carries Northstar also (re-badged as X2).
You also have an O'Reilly's just a little further away.
https://www.batteriesplus.com/batter...7m/sli27magmdc