Has anyone used this company's stuff ? http://batterystuff.com/categories.html?c=123&f=batteries_rv_marine There fully sealed and come in gel and agm. The price per amp hour seems good. I was going to go with the 2 6v golf cart batteries but dont like the idea of having non-sealed batteries in my boat.
I've run non maint. free batteris in my baot for a few years with no problems. I would think its only an issue if they are mounted any way but upright.
220-245 amp hours in a spill proof case is very appealing. 160 lbs is a little much but if your planning on adding 4-5 optimas this would appear to be a great alternative at half the price. Just not sure if the brand is any good