I just got my RX-V667 yesterday, and WOW it's much better then my previous RX-V565 receiver, first off i could notice the bass was more powerful, i actually had to turn it down to negative 3, on my other receiver i had it set to positive 4. Another thing i noticed is that, i feel more surrounded with the sound when i watch movies or play games. The center channel is much clearer now before i could barely hear the voices, now they come in crystal clear. Overall im impressed with this receiver, and for the price its much better.