I am currently researching a/v recievers and speakers to set up a home theater system. I ordered a Panasonic 50" plasma(TH50PX60U) and now need recommendations on the rest of the system. I am looking at receivers in the $1000 range(Rotel 1067, Marantz SR7500, Denon AVR3806 and Yamaha RX V2600) that are 7.1. All of the receivers have favorable reviews. Most have comparable features(HDMI etc.) Not all have THX. Which features should I consider essential and which are just good to have? I will be mostly using the receiver for music but also want the best receiver for video. Basically, the most bang for the buck. As far as speakers, I have listened to Vienna Accoustics Webern and Berg. I am looking for on wall applications. The room that the system is going in is 19'x15' with an 18' ceiling. The budget for the speakers is approx. $3000. Any recommendations would be very helpful.