I'm in the same situation and our heat is hard on batteries. I can get an Optima Yellow d3478 (750CCA and 3 years free replace) for $190 locally or a Sears Diehard Platinum 3478dt (880CCA and 4 years free replace) for $180 on a current Sears special, normally $200. Used Optima's in the past, great battery, and I am sure they have sorted out their problems from the move of the manufacturing to Mexico. Sears Platinum is made by Odessey Batteries an excellent company, with the special price I think I will go Sears if it is in stock.