I have Pio VSX-1019ah, TSI400s for the front, TSI300 for the surround and CS10 for center. I was hoping to retire my Sony DAV-FC9 system with this setup without a subwoofer, but I ended up reusing the Sony sub. The Polks are great, but you need a sub. If you notice, the 34Hz low end is not specified at -3db, they rated 44Hz at 3dB if I remember correctly. Very good speakers indeed. I don't have the space otherwise I would have bought the TSI500. My TV room is 15x16 feet with cathedral ceiling and they sound nice. However, I have bumped up manually the EQ of the 1019AH at the lows and the highs and my sub is setup to the PLUS mode to produce bass also from two channel sources as in CDs. You can see my posts in the 1019AH owner's thread.