Rather than doing everything in one shot I would do it in steps. You're going to be spending the money anways so why not upgrade your alt and batteries now and see where that gets you? I think it would be very informative for you and the users of this forum to see the difference. Also, I have read on here that some Hondas have a weird voltage regulator that makes running stereos a major PITA. I recommend doing the electrical upgrades, determining if your car has the voltage regulator issue and then posting back with the results. A lot of people; including myself stand to learn a lot from your experience.