I have an Xtant 600watt mono amp. I am looking for the loudest deepest 12" subwoofer I can run with that amp. I have narrowed it down to 2 choices, either an RF HX2 500/rms 1000/max or a pioneer TS-W2000SPL 750/rms 2,000/max. I am kind of leaning toward the pioneer, however I cant find out much...