I went the crown golf cart battery route, I'm pretty sure its been almost three years. Couldn't be happier. I spent $1,200 for the batteries and all the cables top hook them up. Lifting 16 small batteries into the hole is a lot easier than 8 large ones. I also had my battery charger die last year and it cooked the batteries. I got to the boat and the acid was a few inches below the top of the plates. I replaced the charger and refilled them and so far they have been fine. I would have been a lot more upset if I thought I had just cooked my $5,000 Rolls batteries. When I bought them the shop told me most of their customers using them are seeing 7 years out of them. I know you said you didn't want to hear about the golf cart batteries but it seems like you may have changed your mind after hearing the price of the Rolls. My boat has 1292's and they've never had a problem cranking them.