Was looking around the internet this morning trying to find a good start point to manually set up my equalizer vs the Audyssey auto setup and stumbled across this article on THX certification and what it means. It's a lenghty and in depth article but also very informative. The author doesn't seem to be pro THX and says many AVR's and speakers not THX certified are just as good or better. My sound is OK but I want to tweak to get the best sound and I was thinking my main/front speakers were not full band (Lower -3dB limit 30Hz) to 40KHz and maybe that was my issue (bigger is better right?) Part 3 of this article (under Main/Front Channel Speakers) suggests you don't want full band speakers in a multi channel set up. Anyways all that aside it's a good read and will give you a better idea of what to look for when you are out shopping for new audio stuff. As always it's just one persons take, although he does seem well versed in this area.