I am looking at one for my bedroom and am wondering how everyone auditions subs. Speakers and equipment, no problem- but subs? They sound different in every room. Not every sound shop around me has all brands. They will let me take some home BUT will not give me cash refund only credit towards another brand sub. I am looking to spend around $500 and leaning towards Paradigm PDR's or Definitive. Is there a particular CD I should bring and listen to or a specific track on a DVD? This sub will be used 85% of the time for movies. How do you guys tell which sub will work for you? Thx.