I only trust the brutus amps from the hifonics line. Also, I'm not a fan of anything running 2ohms or 1ohm because I don't like to put a lot of stress on the amplifier. Even though amplifiers are "stable" with a lower load it still puts more stress on the power supply. You can still reach 150 decibels with 500 watts so don't think that raw power is king. There's a setup floating around that can actually hit 130 decibels with 1watt. Design and installation takes precedence over power.