I recently purchased a house that has a HT in the basement. I negotiated the TV and Speakers in the deal, but the seller took the Receiver. I currently have a Mitsubishi 65" Widescreen HDTV and 7 Klipsh speakers & sub. Two of the speakers are built into the ceiling, while the others are set up like your typical HT. I need to buy a new receiver for this system and haven't really set a price limit. I want a high end one though. The questions I have are: 1) Should I pay attention to whether it's THX certified? What does that really mean anyway? 2) Since I have 7 speakers, does that mean I need a 7.1 channel receiver? (forgive my ignorance) I guess I'm really looking for something that sounds amazing here. It doesn't have to be full of power, just full of sound. I'm hoping to watch a lot of movies (dvd of course) and regular tv, but also play quite a bit of music too. Please recommend a few. THanks!