NAD M-33 or Hegel H190

As one moves up in higher quality audio equipment, the extra functions disappear. The emphasis becomes sound quality. Extra functions negatively impact sound quality. Tone controls, multiple functions in one box, and unnecessary functions are the realm of mid-fi. Twenty thousand dollar preamps do not have tone controls, or amps do not multiple amp outputs. So it is a question of what is important. Nothing wrong with having lots of functions, but there is a large cost to sound quality. Sound quality is secondary for 90 % of the folks out there. If you want great sound quality… then you are not going to get dual speaker outputs, tone controls, and lots of other stuff. It’s just a question of priorities..

You may be at the boundary of sound quality vs convenience. If you want to go forward, you may need to decide if the extra hassle of effort, cost, and research is worth it to achieve greater sound quality. I have been at this for fifty years. I have been reading, listening, and investing in single purpose components, increasing the sound quality of my system for decades. Perhaps this is just not your cup of tea. There is another way, Linn produces extremely high quality systems in a box. You can get a streamer, preamp, amp and even a phono stage all in one box (up to $34K… for a really high end solution). But, only two speaker outputs. Multiple speaker outputs is a low end feature.

I know little to nothing about amp design but I second @ghdprentice : the number of functions they jammed into one box is not conducive to better sound. 

we have sold both 

it depends on what youare looking for 

both are good if you want anaxremely musical integrated look at the unison research due plus a seperate streamer the due is a hybrid design so you are getting the warmth and musicality of tubes

Dave and Troy 

audio intellect nj

nad and unisin research dealer

I'm not sure I agree with your statement about I/O on high quality amps or combining multiple speakers @stuartk. Take a look at MAC and every other amp over $30,000 and you will find a huge number of options for multiple speakers, e.g. subs, midrange, etc. While less is sometimes more, agreed, it is not necessarily in this case a clear sign of superiority. 

@aldermine

You assert that "sound is really the point" yet you keep circling back to the need to run two speaker pairs. If in fact this is non-hegotiable, I don’t see how any amp will win you over on the basis of sound alone.

Why not simply search for integrateds that provide for two speaker pairs and then research their sonics? This seems the most logical course to me. Why make this more difficult than it has to be?