I used to use Dyno gc, but this last go round I upped the battery count to ten for the house bank and went with lifeline agm. They have more capacity, take a faster charge and also represented almost 4K worth of cost. This winter the marina lost power and had enough surge that the charger went into an error state and would not reset automatically. When I found it, the house bank was so drained it could not run a cheap toy from China. They did take a charge, but the risk of an early death or diminished capacity suddenly seems more tangible than before. Last June at haulout I put in underwater exhaust for a northern lights 5kw and a sound shield. It’s freakishly quiet that I can run it in any anchorage at any time. So that makes me nod more towards cheaper gc, you might beat performance, but not value.