RZ900 has been one of their better units. It sold out pretty quick, Onkyo change up some of the build. Added some technology and replaced their 'WRAT' With HDR'. If that means anything to you, not to me though. I used Onkyo for sometime, like some of their units I had and didn't like some. Last one I had was NR656 and have to say performed well, still performs well my son has it now. If you do go with the RZ900 go with a site that has a good return policy just in case you don't like it.