OK I've narrowed by purchase of a receiver down to the Pioneer 47tx/Harmon Kardon 8000/Yamaha RX-Z1/or the Denon 4802.My question is once you get into this price range is there really much of a difference in sound quality for HT purposes ONLY?I'm leaning toward the Pioneer because it's thx ultra2 cert.But is there realy a difference in sound AND circitry quality in this price range.Most salespeople tell me all Japanese receivers are harsh sounding vs American. Sony by most accounts the harshest and most overpriced and pioneer the least harsh of the 4 I named. Denon being the next best in soound quality.What about H&K and is there really a difference the avg listener will hear? Thanks again for your help.I'm beginning to think I should just buy the Pioneer and stop worrying.