I have a 2000 impala im looking to upgrade to a 3500 rms amp....I already have an optima yellow top in the trunk but im looking for another decent battery to run the amp I want....I have a stock alternator for now (about 105amp).................I also would like opinions on sub sizes to pick....2 12s, 1 15, or 1 18...I want to have a custom built box for specs of the subs I decide on upgrading to...I want the loudest i can get..thanks
