you can also get a Marine deep cycle battery... but yeah, I have a red top too. Well, I'm not using it, but i have one in my room. Should start using it once I relocate the battery to the trunk.

 

red top is a better starting battery than a yellow top but offers less time using ur system with the car off. I would probably just grab an exide from CT and that should be good, especially since i think they come with a lifetime warranty