I currently have a 12" MTX 9500 powered by a Quantum Audio 4000w amp. The amp is okay but i want to find something better. I was looking at the MTX Elite 1501d Amp, MTX Thunder 1000XD, JBL GTO 14001, & some HIFONICS amps. Which would be the best? I want my sub to hit hard and have the right amount of power.