Would you say you would get similar results to these 6 receivers, when you compare the 9.2 channel versions of them? Slightly less watts per channel, but most features remain. I just got the Onkyo TX-RZ830 for example and it is definitely a step or two up from my Onkyo TX-NR737 in sound quality and features. For my room (11' x 25') with 7.5' ceilings both receivers perform well. The reason I upgraded was so that I could get HDR support through the receiver and two front height channels. My room is not deep enough for 7.1.4, as the back of my room is already crowded with regular surrounds and rear surrounds. Having a great time with it except for the AccuEQ microphone stopped working after 3 uses. Through the warranty Onkyo is shipping me another microphone free of charge, so support has been great so far.