I'll spend more if your in Canada since i'll save on the taxes. Will spend $600US max....
Looking for SVS 20-39PCi or CS, SVS 16-49PCI or CS
Paradigm Servo 15(yes they are cheaper up here, i'll pick-up )
Mirage BPS-400(same as above)
HSU VTF-3 (get these at cost)
other excellent subs that play deep but still sound good for music and movies.