best-sounding class D amp?

Hello,  I have seriously listened to Mola Mola Kalugas, Benchmark AHB2 (Monos), Appolon, and PS Audio S700 mono's.
By far the most musical, engaging, powerful, dynamic and resolving were the Kaluga's.
Those small beauties replaced my venerable Classe CA-2300.  Thanks,  Ken

I reside in the mid-fi world of our obsession so I would not presume to suggest a candidate or even subscribe to the notion that a “best”class D amplifier exists.  I did however purchase, without a listening session, from Wyred4Sound their ST 1000v2 amp.   I did this to experiment with much more power into Magnepan 1.7s.   I am very pleased with the amp.   In fact I use it in place of the amp section of my McIntosh MA 6900 integrated.  Yesterday I listened to Schubert and was thoroughly entranced.  The piano was in the room, natural and warm and properly scaled.  I heard the pedal action and could easily imagine the venue size and my perspective within that venue.  I’m getting older and have resigned to not search further for my best, let alone yours.  Class D did however get me to a very nice place.  Good luck with your search.

Look at PASS amps much better than classl d pass on class d maybe in 10 years it will get better.

How long is a piece of string? 

The same strictures apply - what speakers, room, etc. 

I'd also suggest that shopping for an amp based on its class of operation is . . . interesting. 

Merrill 118 monos supposed to be really nice. Also bel canto black.

i don’t think it’s crazy to buy solely because of class, if such things are important to you. 

In some ways not much different than some folks only interested in electric cars