Oh my, let me tell you. If you aren't paying almost twice for an AGM battery over lead acid, your getting junk. Optima batteries are some oif the worst AGM batteries, as of two years ago. They went to **** after they switch manufacturers.
Sears platinum Marine AGM's are rebranded Odyssy batteries and with a free THREE YEAR over the counter replacement warranty, cannot be beat.
Second runner up is the same rebranded Odyssy batteries from West Marine.
Third would be Cabellas.
I've never installed Deka AGM's, but I'm sure they are equally good.
But do not buy optima's.