As I imagined might be what you were looking for

SVS makes some great subs and some in your price range. With all that window and size, they may rattle to breakage though

Then my next question is does your receiver decode the new hi rez audio on the bluray? Or, your player can but needs the analog inputs on the receiver?
As to acoustic panels, that was covered well by others. Yes, they do help a lot. They can really blend in with your room decor and if not, no one to answer to
