I bought a 663 and am using the preouts. It performs as advertised, with regards to features. For $350 I got exactly what I paid for- gives me all the options I need for blu ray and hdmi. I've liked the auto setup thus far, the menus are very intuitive, the om is easy to read and use, and my harmony remote works flawlessly with it.......
Is it cheesy in terms of build quality? Wellllll, yeah. The plastic front face is pretty flimsy, the volume control feels really cheap, and the binding posts are less than robust. Other than that it does what I purchased it for.
I would say that all the other htr in this price range will fall close to this bq.
I would expect the rxz7 to have a much higher level of bq. I can't comment on the Sony product of the ops orig. post. Not a big Sony fan, frankly. I have liked the Pio products I have owned, especially the elite brand. I think at this price point you are paying for feature rich products. There isn't money left over for a heavy duty build....imho.