Polk Audio RM6750 5.1 Channel Home Theater Speaker System, Black FinishI have been using this speaker system for about a year with a Sony STR-DG810. I am very pleased with the performance of this package especially at the price point. My friends and family have all been impressed remarking that the system sounds like a movie theater. Bass from sub-woofer is deep and powerful and the center speaker reproduces dialoge beautifully. What is also nice, Polk sells seperate surround speakers so I can make a 6.1 system since my Sony receiver has that capability. Don't worry if you are thinking about RM6750, I have enjoyed mine from the start!