We usually stick with Sears Diehard batteries. I know a lot of people say they suck, but around here they last longer than any other battery we've tried.....and we've tried quite a few.....Everstart, Exide, DuraStart....all about the same. With those brands, if it's a 5 year battery, they seem to last about 3½ years. But a 5 year Diehard will last about 5 to 6 years in most of our cars. Just enough to get it past the warranty date.
Geez Dave, that 1300 CCA battery you talked about is what we need for our tractor! It's an old Case 930 diesel and man that thing starts hard. It originally had two 6 volts wired together, but my uncle later switched it over to two 12's. Now that my brother owns it, he decided to try just one good-sized battery, so he got a Diehard 875 CCA battery and that thing still won't stay with it if you have to crank it very much. The biggest one we've found is like 1150 CCA, but it's some kind of Sears marine deep cycle thing. $239 too! I told him just to get some little 550 CCA battery and we'll wire it back in with two batteries again, like it used to be.