I soon will be putting a SoundQubed 2200.2 in my car, and am trying to determine what type of battery I should upgrade to. My stock battery is a 750 CCA lead acid EverStart. I was looking on XS power's website for the batteries they reccomend for what wattage system. For a starter battery for systems up to 2500w, they reccomend their D2400 which has 670 CCA. What is the main difference between the two really?