If you considered the Paradigm ultra cube and that price was not out of range and you are looking at Hsu, an internet direct company, I would highly suggest looking at the SVS PB 13 Ultra. It is a bit more money(when I was looking at subs) than an Ultra Cube 12 but well worth it, IMO. I have the PB13 and it hit 15hz in my room(when tuned to 15hz) and sounds great when I play music, all the reviews on it are not wrong.
Another option might be looking through Canuckaudiomart to see what is available used, I have seen the MFW15 available from a few listings and they were in Canada.
