PS Audio BHK 300 mono VS Modwright KWA 150SE mono VS D'agostino Classic stereo

No, I don’t accept the premise that you can have too much "true" transparency. I do believe that you can have too much brightness and tilted up high frequency region emphasis  that some may interpret as transparency.
Charles

I don’t accept the premise that you can have too much "true" transparency.

I agree with Charles.  I just received my Metrum Pavane DAC back from The Netherlands after being upgraded with their Transient  DAC TWO modules that are also used in their Adagio.  The transparency is exceptional and the result is an analog-like relaxed musicality - transparent, resolving, nuanced but very natural sounding....go figure.

Yes that's what i meant too much brightness.
I guess the only way to know is to try out.
One thing that is sure is that the Aelius monos will lack bass slam compared to a CH amp.
The midrange should be a little sweater and magical with the Ypsilons.

Keep me posted- thieliste.

Open up your minds dont think top digital is a liability you would be dead wrong !!
I  owned a Stereo store and had many  $$ systems. 
Merrell audio in NJ,U.SA  their top amps have classic class A sections 
As well as top digital modules think up their top Levinson, Krell Ayre
For  $12k flagship,or less$$  if you can get a deal their top mono blocks 
Just read the Many Great reviews Not one even questionable. I am looking to buy their Thor mono blocks only because I don't have the extra money
And even at $5 k price performance Champs. You would Never know 
What was inside. The sonic goods is what it does in spades. Please
Do  yourself a Big favor. I invite even the Biggest skeptics which I was one of them
Go give these electronics a solid workout .their preamps also. Myself own 
Custom Build Radu Tarta Vacuum Tube gear which I consider Top shelf .but their SS gear if Very good.
Go read the many reviews ,then get a listen.