Currently have completed addition to home that includes family / media room. Room is 20x20 (not ideal I know). Currently have Bose AM 10 and realizing how bad these are, want to buy new. Have SVS sub already. Like Def Tech line (thinking of buying BP10 or BP30/clr2000/BP2x) but dealers have no return policy. I am concerned that when I get new speakers home, I am not going to hear enough improvement to justify the expense. Part of this may be due to the accoustics in the room. Some local dealers (HiFi Buys /Tweeter) that sell other speakers (Mirage, Klipsch, others) offer a "bring back for no question refund if you don't like" guarantee which I like. Should I take a chance with the Def Tech, or try Mirage first knowing that I can return if not impressed? I have heard that bad accoustics will cause the "turn it up (for detail) then turn it down because it is too loud" which I have blamed on my Bose. If I am going to experience this with other speakers as well, I might as well not replace what I have. What do you think?