Sorry to call you out, you were just a lot of help talking to me about the electrical system so far. You said for about 2500RMS to put a 240-260amp alternator, 1 kinetik hc2400, and a smaller one in the front. What size would you suggest going in the front? I live in Minnesota and am in Nebraska for college, so it's cold if that makes a difference.
For a 2500w class D amp, 200A alternator should be fine. If you can get 240A+ and can afford it, then go for it. Unless you're into competition, or just want the best, you can try Optima Redtop or Yellowtop battery. If you want safety, then put redtop in the front, yellowtop in the back with isolator. That way your starter battery will never be drained by the amp. This will also ensure you will be able to start the car.