IMO, no. The yamaha has a good dac and ample power with low distortion, if you step up in avrs, it will become incremental.
@PENG has driven his KEF R900s with a denon x3300 and 4400 and has a thread detailing such.
As I mentioned in my AVR-X3400H and X4400H thread, I have compared them with my separate systems that I doubt any Rotel integrated can compare in terms of specs and build quality. To me there was no difference in sound quality, and I plotted some FR graphs simply using REW and found practically no difference in FR, impulse response, distortions etc.
You and I , and I guess @ADTG, @HD,
@Verdinut etc., have all been there, done that and then found out after spending tons of money, separates in many cases don't really improve sound quality over mid to mid high end receivers, though they do usually offer better build quality, simplicity and Placebo induced audio benefits for two channel music listening. To be fair, there are also very credible members such as
@RichB,
@Irvrobinson who will tell you different stories, they likely do have more discerning hearing ability.
I have to admit also, while I enjoy my cheap AVRs for music listening, I don't have regrets on having purchased my separate components either, and I am keeping my integrated AVP, premaps and amps,though they do just sit idling most of the time....
