Optima gets a lot of talk but I don't think they''re really any better than anybody else's AGM style batteries. I had a 12v Optima battery die last year after only 5 years. Considering the ridiculous price they ask, That's unacceptable.
I have a 6v Everstart conventional battery in Ol' Roy for the last 5 years. So far, so good with no signs of trouble.
Considering the local Pull-A-Part sells batteries for $20 each, I think that's where my next battery will come from.