i have an amp that will kill what you have now for 200+ shipping, its a concept cd-2410 i paid 800 for it new(2400 at 1ohm and over 3000 at .5) i just need to make space in my new house let me know if you want it
the 12's should get louder in the right install, and sound just as good...only downside to the ssi's, they are a bit power hungry other then that great subs...Good Luck with the Search/Sale