BTW, if the music you like has notes below 20 Hz, the 500 may not be enough for you.
I don't really know what I don't know yet. I have doubts that the old DefTech sub hit notes below 20 hz. The SVS might have, but I don't know how well. I'll just have to try out the EP500 and see how it sounds; it it doesn't hit low and I don't miss anything, I should be happy.