All i use are interstates and optimas. I have an excellenct interstate dealer near me and we usually go in every other month and check out supply. I have been buying blemish batteries that truck drivers and heavy equipment use. Good cranking power and a LARGE reserve.
I use these batteries in demo derbies and have never had a problem(very durable) and i run my 24v trolling motor off a pair of them and they work excellent I think i have about 5 of them that i use myself in addition to some other batteries.
I can’t say what i get them for but its comparable to a everstart from Walmart for a car.
This last winter, i purchased an optima gel batt. to power the fish house. We would use the house every night for a week with all the ceiling and hole lights on, after a week it would need recharging. Using a regular batt., they needed to be recharged every other night. You take a hit in the wallet, but they are well worth the money.