Bought a used boat this past fall, and it came with an Optima Marine battery. I've not had any problems with this battery at all. We've run the radio for quite a while while swimming and such, and it still cranks over my BB just fine. <br /><br />I want to install another battery and selector switch and was wondering if the Optima line was worth the money. The battery I have costs $179.00 at a couple of places I've looked. Is Optima worth that much? Are they really that great of a battery? Would any other good grade of marine battery be just as good?