well, the only other suggestion I have for you is not a battery... I mean the batter is only used to start the car, once the car is started then the battery doesn't do much but sit and get charged. If your system is taking all the power out of your battery, than another suggestion I have for you is to get a high output alternator (a pain to replace compared to replacing a battery). You can find a gel batter at Pepboys. or go to a performance shop, they should be able to help out a lot. I hear Odysey is a great brand.
