more of the same. Alphasonik makes some good high current stuff, but its likely more epxpensive than you want to pay for.
try
www.zedaudio.com, or buy a used series VII or series VIII Hifonics, an old Autotek BTS, an old PPI A600, or an even an old school 1995 or older Orion HCCA. A quick comparison on ebay will show that these ten year old or older amps will sell for MORE than brand new jap crap from alphasonik, lanzar, audiobahn, etc etc etc.