I want to know what you think of your SR600. I own the SR600. I have little experience with HT. I can tell you that it easily hits reference levels with my Audax HT kit speakers. These speakers are fairly inefficient (87ish db and one watt meter). The sound quality seems to be pretty good. I am running a sub. The bass managment works pretty well. I don't use any surround processing when listening to music.