I am looking into upgrading my home audio system. I use it mainly for movies and games. I have Polk Audio speakers (FL, C, FR, SL, SR) and a JBL powered sub...however I am looking for more power and better sound at higher volumes. I believe that my problem is my receiver. Its not real old (about 2-3yrs maybe) but it was only like $249 (it is Pioneer but not sure of the model off hand). Does any have any suggestions on improving the setup. Do you think replacing the receiver would make the difference or considering just buying a complete surround system and selling my stuff?