High end Class D amps?

There are so many highly experienced audio pros in this thread that I still get a little overwhelmed by the technical talk, specs, etc. So after reading all the responses, here's what I'm thinking---so I have a pre-out on my Luxman 505uxii integrated and I have a pair of power hungry Dynaudio Special 40s. I am thinking of adding a class D to help the little Dyns and this is why I started the thread. Between looking at the Dynaudio S40 specs and the class D specs, I'm not sure which one would be better (or all of them). Let me know what you think. Also, I've never tried monos so that sounds interesting (budget is < $3k)
1. D-Sonic M3a-800 s (stereo or mono)
2. Wyred 4 sound ST500 Mii (stereo or mono)
3. Nuprime ST-10 or ST10M (really looks interesting)**
4. Bel canto REF500s
5. Red Dragon S500 (all sold out for now but Ryan at RD emailed me and said the Mk3 will be coming out in Q1 of next year---COVID has slowed everything down)

All have great reviews. I think all of them have 3-5 year warranties and pretty good customer service. I appreciate your thoughts and suggestions. 

You should really add these to your list.
https://www.cherryamp.com/
Also, take a look over at AudioCircle; there are a number of active forums from Class D manufacturers and a variety of other threads.

The Luxman is more than enough to drive those speakers.

djones51
The Luxman is more than enough to drive those speakers.

Ditto. bluorion OP
Just look at the impedance/phase curves, absolutely no problem for the Lux, and it will sound better that any class-D on them, to boot.
https://www.stereophile.com/images/918DS40fig01.jpg

Cheers George

I'll wait for Atmasphere's amps.
If he can do for Class D, what he does for tubes, then I know it will be so good that I don't have to bother looking at other amps.
B