Great multichannel amps do not cut it in stereo
This is more of a comment than a question.
I have been dabbling in hifi for almost two decades, and in the past 8 years or so moved into what I call 'quality' audio - as far as my budget could muster. I listen to multichannel all the time for TV and movies, but love my 2 channel set up, supported by my dedicated 2 channel amp to run stereo duties.
Since 2009 I had been lusting after the Arcam AVR600 as a no-compromise one box solution for both multichannel and stereo. With the AVR600 model coming to the end of its life I managed to land a new one for a very reasonable price compared to its original rrp. Heavy? Yes. Impressive? Yes.
However, as a two channel amplifier it did not come close to my $1500 Burson Audio integrated stereo amp in terms of detail, soundstage, PRAT etc - in my opinion.
As many have said before, you can not expect one car to be both a utility and a sports car; and you can not expect a jack-of-all-trades also be a master in one area. And this became very evident to me in my comparison.
The Arcam AVR600 is definitely a nice piece of kit, albeit it has its technical gremlins. But it simply can not keep up with a high quality dedicated stereo system, if that is what floats your boat. I can not imagine multichannel separates being much better, as these had been extensively compared to the AVR600, with most indicating a close to on-par performance.
So really, my message is that for high quality multichannel and great stereo reproduction, look for a two box solution including a dedicated stereo amplifier. Spend less on the former, and more on the latter!