Originally Posted by NAIM101
To fill a room that size you will need to increase your budget pretty much. There is no point in getting the subwoofers you listed because its gonna bottom out and not even be worth buying initially. Save up and get a bigger sub like the VTF-15H from Hsu or the SVS or the Outlaw.
From 40hz and up the PA150 pretty much matches the the VTF15. So if the OP is not concerned with filling 3000 cubic feet with low bass (which cannot be done adequately with $500) he might as well fill in the mid bass and at least get some good punch.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron