battery suggestions?

FWIW, I've always used a 10 amp automatic taper charger at the race track and also at home. My race car has a 50 amp alternator, as the rules require, but I charge the battery between rounds to keep it topped off. Besides the usual ignition and lighting, it has an electric fuel pump as well as electric fans and water pump that are run between rounds to help cool it. (I don't use a "manual" battery charger because it can overcharge a battery if left on too long.)

At home, I use the charger to charge the race car to top it off after the races and the battery in the trailer, as well as the dual battery dually truck if they sit a month or more. I never had a premature death of an Optima. I've had the Sears Platinum DieHard/Odyssey batteries in the car and truck for only a few years so far.