I need tips on a set of subs for my grand marquis that will be louder than my last setup. I had 2 15" Memphis mojos running off of 2 bxi16082. I will be going with a ported box and the new amp is a audiopipe ap30001d. It does 1500x2 rms @ 1ohm and 3000 rms at 2ohm bridged.. Any help would be...