After 5 years, my trolling motor batteries no longer pass a load test.

Want to replace and move up front in storage area and put on separate charger.. Thinking of going with AGM type battery because of rougher ride up front and fumes from flooded type. Will still need to use as storage area as well. Plenty of room for both.

Current batteries are Group 29 flooded battery and have worked fine for long time.

Looking for recommendation on AGM batteries due to cost. Size, AH, etc. Any issues with moving up front I should be aware of?