I just put AGMs in my wx 1910. They are not much better for run time than my lead acids were. All have been grp 31s. I troll the river as well and on calm days I’m ok but on windy days I end up using the big motor and then I can’t use i-Pilot link.
I just put this brand of lithium(100ah)on my boat to run all my electronics and have been very happy with it. I paid $370 for the battery. The Interstate AGMs were just short of $1000. After the AGMs go I’ll be putting 3 of the lithiums in. It has a Bluetooth app to see all battery info real time. My buddy put Ionics in his boat and they are nice but this is equal in my opinion. His cost him $2000. Guessing the price may be lower for the battery I bought due to the 5 yr warranty versus the 10 or 11 yr warranty from Ionic.