Ok. I have 2 S15L7'S (KICKER SUBwoofers) WHAT AMP SHOULD I USE SO THEY SOUND GREAT?

[1995 Chevy Caprice 9C1]

I HAVE A GOOD BOX WEIGHS A GRIP. BUT I ONLY HAVE A HIFONICS BRUTUS 1606D AMP.. I HAVE IT BRIDGED SO BOTH SUBS HIT. IT SO DAMN LOUD BUT I KNOW THE RMS ON THE SUB IS ATLEAST 1000 BECAUSE THE MAX WATTS IS 2000. SO WHAT AMP WOULD YOU RECOMMEND I USE?? I HAVE A PORTED BOX AT 80hz