Yamaha makes some KILLER amps! In the right units, power is clean and crisp. Some of their older units have been my favorite home audio components. I am not super familiar with polk's speakers in general however, some years ago I purchased a pair of tweeters for a car audio system and they were by far the sweetest sounding tweeters I have ever owned. Unfortunately, they are no longer with me... The sun eventually got the better of them but I ran them for about 10 years which is pretty damned good! If they sound anything like those did, your system is VERY nice!!! In a lot of cases, I prefer the older gear for its sound quality. The digital stuff just doesn't seem to have to warm 'soul' of the audio I love. To each their own. I totally get what you're saying about the neighbor issue too. Having a killer system that you can't use is torture!