Im a newb when it comes to doing this part. I drive an rsx, with 0 gauge big 3, stock batt and stock alt. Is it wiser to upgrade alt or new battery first? I want to spend the least and still get by. running 2 amps. nine.2 and nine.1 looking at around 1400- 1600 of watts usage. I dont get dimming unless the Mx mode is on for the Alpine. Can i get away with just a new battery?