IMO the 9400THX is the best HTiB on the market with all components being of the same company. My wife's aunt & uncle have the 9100THX, and my step-bro has the 9300THX, and for a complete HTiB they sound great. Those systems have the same speakers as the 9400THX just different receivers. Just remember the freq. resp. specs on the speakers and sub are a little misleading as they dont have a +/- db. But THX specs say to meet certification the sub must hit 20hz at -6db and the speakers must hit 20khz at -6db.