I've got a Denon AVR on my main system. It's nice. I recently listened to a Mirantz AVR 7xxx and the Rotel RA-12 back and forth driving the same speakers (B&W 702 S2) and to my ears the Rotel produced much better sound. Sound and vision benched the Rotel at 77 wpc rms into 8ohm and 150 into 4 ohm (.1%hd). Given that I would have to think it will be putting out over 100 into 6 ohm which I'm hoping will suffice.
First and foremost, I am definitely not trying to convince you to just buy AVR. It's a hobby, and there are other factors involved. Some people just like the fact of owning NAD or Rotel better. Nothing wrong with that.
This is just purely academic for conversation only.
I've owned and listened to many high-end gears (Mark Levinson, Bryston, McIntosh, Anthem, NAD, Rotel, Classe, etc).
Bias is a huge, especially when the comparison is not level-matched and blind.
Just for fun, let's compare the Rotel A12 vs Marantz SR5009 (equivalent to Denon X2300).
Rotel:
90W/8-ohm, 165W/4-ohm x 2Ch/1% THD, Crosstalk –63dB, SNR 99 dBrA.
https://www.soundandvision.com/content/rotel-a12-integrated-amplifier-review-test-bench
Marantz/Denon:
130W/8-ohm, 204W/4-ohm x 2Ch/1% THD, Crosstalk –83dB, SNR 104 dBrA.
https://www.soundandvision.com/content/marantz-sr5009-av-receiver-review-test-bench
Unlike speakers, the measurements for electronics don't lie.
You can see how the Marantz/Denon outperformed the Rotel in every category.
Really, the crosstalk and SNR of the Rotel is worse than a $300 Yamaha V377 (Crosstalk –77dB, SNR 111 dBrA).
https://www.soundandvision.com/content/yamaha-rx-v377-av-receiver-test-bench#HqXduU8X1xgeam8U.99