Just FYI, the costco Optimas are a little smaller in capacity than a 'standard' optima. Still a steal of a deal, and I love my 800ish CCA red top.

FYI: This is my 3rd optima in my Toy. Red tops hate deep discharges from winching/sitting for long periods. If your rig is trail only and gets parked for 2-month stretches, be religious about pulling the negative cable, or get a yellow top.