Help! What should I do?

Okay I have a few question actually... 1) I have a 2000w jbl amp that is running my 2 jbl p1022 sub-woofers. Amazing and power hungry are the only words that come to mind!!! I'm going to buy 2 batteries. One to replace my old battery and 1 jus for the amp but will the stock alternator in a 96 lumina be enough to keep a charge on both? 2) what's a good battery beside a $200 yellow top? 3) I was also wanting to make an amp switch ( due to recent ticket ) but have no clue where to start with that! Any info or a how to would be great.