WEll we use Optima batteries in all of our equipment and most of our vehicles on the flightline with the USAF, so must not be too bad..
I have owned a red top that was in my wife's Tiburon for almost five years with a full audio setup on it, that ran two fairly large amps any time the car was on. Even powered the system through a few competitions and was still working flawlessly the day we sold the car, and from the current owner tells me it is still providing awesome power almost three years after that.. so now sitting at 7years of use.

I had a Yellow top in my 00' Cougar which provided great power for 5 years, and then sat for over two years, and still started the car. I will be purchasing a Yellow top for my XJ as soon as I have the money to spare, or my current battery dies, which ever occurs first!!