I find Denon to be more musical than Onkyo. One thing I did notice with the Onkyo is it upconverts to 4K where the Denon doesn't. The Denon has HDMI passthrough which will be OK if the original content is 4K, but won't convert other sources to 4K. I haven't seen any results from conversion to 4K, so not sure if it's a good feature, but would probably want it iif I had a 4K TV. My darn Sony XBRs are still going strong after 7+yrs, so can't justify an upgrade. I have seen 4k and it is pretty awesome, but still willing to wait for the Sonys to fail on their own. Maybe by that time the new DTS version will be out as well as full versions of HDMI and HCDP. I had been intrigued with Atmos, but the DTS is supposed to be better.