After the covid downtime both my batteries were gone. I don't know if they were the factory installs or replacements from a previous owner. (coach is a 2014) They were nothing special just group 27 Interstate FLA "marine" batteries.
My price point was around $300. I'm not in the Battleborn league.
I did a lot of research and was leaning toward a pair of Trojan T-105's but ultimately decided I didn't want the maintenance responsibility of checking and replenishing the water levels. (Yes I know they have gadgets to do this)
Ultimately I decided on 2 group 27 Duracell AGM's from Sam's Club (about $325 out the door). I've used East Penn/Deka's in my motorcycle and they have been good but not exceptional like the Panasonic AGM.
Wife does not like to boondock so that influenced my decision to pass on the Trojan GC's. Otherwise I would have gone that way.
We'll see how these do over the winter. I think my solar and converter do a pretty good job of keeping these batts charged and I doubt I will discharge them below 50%. Time will tell.