I have not done a comparison of the subs that you are asking about, but my listening room is 12'x21'x8' and I have an Axiom EP175. Last night It was able to rattle the windows and vibrate a couple of things off the shelving during playback of XXX and Star Trek Nemesis(sp). To my old and untalented ears the EP175 sounds very good. That said...It is a little under powered for the size of my room, and I am waiting for HSU to, some day, offer it's new STF subs, so that I can add a second...:) I wonder if the wife will notice...
