IMHO, the best way to get full range bass in most any room is an EQ'd subwoofer. Velodyne DD series (or SMS-1 controller for use with non-Velo DD subs) works well, providing PEQ, room analyzer and x-over. SVS will ship a similar device in May, but that requires an external x-over. The SMS-1 costs app $500 and the SVS with an NHT X-2 X-over is about $1K. Reportedly excellent subs from SVS start at app $650, good subs from many manufacturers can be found for under $500.
Good Luck,
Marty
Good Luck,
Marty