Kirk may be right: if you are interested in HT set-up. Pl see my thread in Music category under 'Below 20Hz notes....' where my recent purchase of REL subwoofer et-up is discussed. If you are perfectionist, you may need stereo subwoofers for correct imaging. A pair of Strata (or storm III) if budget permits may workout. At least storm III that I have has very very good bass performance bothe for music and HT( just done watching the 'Fast and Furious'- amazingly clear and punchy)However the music set-up is tricky.
subwoofer suggestions
I am looking at adding a sub to my 2 channel music system. I am using a B&W Nautilus 804 speaker with MF m3 integrated amp and Linn ikemi cd player. People have told me the Linn sizmik, b&w asw 2500 or mirage subs are good. I don't want something too big but I want nice tight bass, not boomy. I here REL is good but there are no dealers in Toronto.