I have narrowed it down to two subs. First, Yamaha DSR 118W 800 Watt 132db max spl. Second, the QSC KW181 1000 watt 132db max spl. I could use some opinions to make my decision. The church I am installing this in currently has 2 Carvin TRx 218 subs being pushed by DCM 4000 (2000 rms x 2). Any insight or opinions would be appreciated. Thanks!