The Denon X8500H receiver's rear ...
51.4 lbs (net) and power consumption: 900 watts (to give an idea of its power transformer's size/kVA).
Looking @ the rear connections; all 18 video connectors (composite and component) are obsolete. Nobody use those anymore, less than zero percent in 2019 for people buying this type of flagship receiver. All new receivers should eliminate them all and put the money to better use (ESS DACs). I'll keep all the analog preout connectors...29 of them here. The stereo analog inputs (7 pairs total)...I would eliminate 3 pairs (6 connectors).
It's not the most ever loaded AV receiver's rear...the old Denon 5805 was (97 lbs).
Amir measured the Marantz AV8805 flagship pre/pro ...
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https://www.audiosciencereview.com/...urements-of-marantz-av8805-av-processor.6926/
The Denon receiver IMHO wouldn't measure better from its digital section (DACs).
The power I'm sure would be sufficient, plenty enough because anyone purchasing this receiver has also a powered subwoofer or more (2, 3, 4). You just need an additional stereo amplifier for channel 14 & 15 (9.2.6 configuration).
Would the sound quality in music stereo be high-end enough?
For most people buying this type of Learjet flying machine, probably.
For serious audiophiles they'd be better off with a dedicated stereo rig.
That Integra receiver's link I posted above ($700); it would sound equally better in music stereo listening I bet. And of course it's only nine channels of amplification.
The OP was asking for a good actual quality AV receiver. I posted two German links from Arcam and JBL Synthesis latest flagship offerings (AV receivers). Expensive for sure, ESS DACs in both, and equipped with some of the very best Room Calibration EQ sytems in the marketplace today.
Then I came down in price for what I thought was an example or two of good quality AVRs for $700 and $500.
Amir had the Onkyo 805 receiver in the past, but it hit the dust...heat killed it I think from memory. That receiver required a good fan on top rear right corner. I know because I had it too. After ten years it still is going strong @ my brother's place. And power is aplenty.
The DACs? I just don't know...Amir knows best...he's got the measuring machine.
They were the old TI B-B PCM1796 DACs (cheap compared to ESS), and most likely less sweet sounding than the AKM DACs (in general).
From experience (listening); Anthem sounds good, Integra/Onkyo detailed, Marantz warm, Denon warm too, Pioneer sweet chocolate, Yamaha natural caramel, ...my ears don't hear like any other set of ears, they have their own unique shape. What I hear nobody else hear.
So, what is an actual quality AVR?