Picked up a Re XTX 5000.1 to run a 15" Z V.3. Right now i'm running a rockford t400-4 to 2 sets of t1675-s. I just put a new 170amp H.O alt and my lights are already dimming. With the new sub arriving friday i will be putting the Re in and don't think this batt will hold up. Any suggestions on a good batt that will keep this thing running smooth?