You could take the pre-amp out of your receiver and run it into a EP175, set the cross-over point to somewhere from 60 to 120 Hz, and send the high-pass onto an Outlaw 200W monoblock which is strapped to an M22 sitting on the sub (or nearby).

That's less than $1500 a channel. Substitute subs, speakers, and amps to taste.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris