Which Class D Amplifier? PS Audio, Ghent, Nord, Merrill or other???

Don't forget https://www.elac.com/product/dpa-1m-monoblock-digital-power-amplifier/

I listened to these and thought they were very good

I used to have GamuT M250i mono blocks & now use Wyred 4 Sound SX-1000R mono blocks & they are excellent. 
FWIW I use them with Boenicke W8SE speakers & Octave HP700 pre.

Speak to Mark at Elite Audio...

I have two Nord monoblocks driving Maggie 1.7i’s and I love them. Replaced a Bryston 4b2. Running with Sciit, Auralic, and Audible Illusions.

Lots of great recommendations on here.  I own Wyred 4 Sound ST-500 mk 2 and enjoy it a lot.  I've had it for 3 years now and can't complain a bit. They have a 30 day audition period so not much risk there if you want to dip your toe into that water.  My dad, who has been an audiophile for about 50 years, has lived with Bel Canto REF500 for about 12 years now and that says a lot to me.  He has the best sounding system I've ever heard, but I am admittedly biased.  

Recently, I've been looking into an all-in-one box system for convenience purposes and discovered a few more intriguing class D options to include: Peachtree (didn't see this mentioned above), Classe Sigma series (saw that one above), Lyngdorf (TDAI has room correction which could be of good benefit).  

Please let us know where you land!

I had Nuforce Reference 9 V3 but think they lack some "flesh" on music, Bel Canto and a Halcro MC20 were a little bit better but not perfect to my ears. I have now two Lindemann Musicbook 55 bridged and love everything they give from low to highs and for the holographic soundstage.This brand is famous in germany and Europe, if you have an occasion to listen I think you apreciate.
http://www.hifiplus.com/articles/lindemannproac-system/?page=2