Hello . Need to change the starting battery on my P – 3 / 200 optimax. The trojan sc-200 is loosing a cell. I am looking at the optima D 31 m or the Sears platnimum P – 2 size 31. 900 cca on the optima or 1125 on the sears. Sears has the longer warranty and is $40 more. I also run my 2 graphs on it though the dash one only when im hunting fish. Looking for help with descision. 2-3 weeks till i buy. Thanks . Brian Chance