i suggest the hsu stf-2 pretty damn decent subwoofer, however it might stretch your budget abit, its like $550cdn at www.hi-fidelity.com (cdn HSU Distrubutor)

M60, VP180, QS-8's
Marantz SR6005
Behringer EP4000
Stereo Integrity Mag 15"
Samsung HLS5087 DLP