I went with the Sam's Club batteries in 2007. They were $74 apiece at the time. I dry camp 95% of the time but never run them below 50%. I replaced my chassis battery at the same time with a Walmart starting battery. My first set of batteries were Trojan 105's for the house and a Trojan marine for the staring battery, which lasted me 4 years. I think how you maintain the batteries is more important than brand. If you have to water the batteries several times a week it sounds like your charger is working overtime thus using a lot of water. You can try to equalize and desulfate first before you replace them.