Right now I have a Sony de595 receiver that I was hoping to use with some new Polks that I want to get. I think I am going to get the R150s or perhaps R15s as surrounds and R50s as mains. Haven't decided on a center yet. I have looked around here and this setup seems to be fairly popular. My main question was weather or not my current sony receiver would be sufficient to drive these speakers or if I will need to pick up something more. Thanks for the help fellas!