Hi everyone I just completed my axiom 5.1 setup with 2 QS8s, 2 M22s, a VP100 center and the EP-175 sub. First I am hoping axiom will let me send back my EP 175 I have owned it for about 3 months to trade up. I am thinking either the EP400 or EP500. I have it all in the corner of my bedroom with the sub in the closet sort of. Is there a hugh difference between the 2 subs? Is the EP500 too much sub for my system? What would U experts get with my current config. I have this setup for both music and movies but felt the EP175 was lacking for music but fine with movies. I finally got all the bugs worked out with my new Oppo Bdp-83 and Sherwood Newcastle R772 AV and think more Bass is needed just need to choose EP400 or 500.