Class A Gas Batteries- Diehard vs Interstate

The batteries in my Bounder no longer hold a charge and need replaced. Do you guys recommend Diehard or Interstate?. It has 3 year old Interstates in it now (1 chassis, 2 coach). I have two deep cycle Diehard batteries in my boat and they just gave up after 5 years. That's with using the battery shut off switch after each use and the boat sits most of the time