Just read these comments from Tim, and thought I may also provide an update with my experience.
I bought the D-Sonic M3-600M-A (pair) using Anaview AMS1000-2600 modules, back in October 2014.
Having heard many systems with excellent components, including very high end amplifiers, I found quite a strong performance and value in my D-Sonics.
Micro/macro dynamics, resolution, soundstage, tonal accuracy, are all at the top of the scale. But more important, there is a fluidity, an easefulness in the presentation as a whole, I only experienced in very high end systems.
For reference, my system consists of a computer running Foobar2000 application (where I do upsampling, DSP, room correction, DSD transcoding if I want).
I currently have two DACs, a Benchmark DAC2 (Sabre 9018) and a Lindemann Musicbook:10 (AGK 4490).
As far as speakers go, I'm using Dynaudio Confidence C1 Platinum, and recently sold a pair B&W 805S.
Finally, and this can be of much interest for many, I have in house since last June a pair of Nord One Up 500 Monoblocks. These are Hypex NC500 based amplifiers assembled in UK by Colin North.
The Nord amps can be ordered with the Hypex OEM input buffer, or with Nord custom buffer, which allows "op-amp rolling".
To make a good comparison, I ordered the Hypex OEM input buffer, as well as the customized Nord Buffer, with SI 994 and Sparkos discrete op amps. This way, I have three different options in the same amplifier.
I can provide more detail, but in summary, both Anaview AMS and Hypex Ncore are, subjectively speaking (no measurements done here), at the top of the current class D chain.
My current order of preference depends on the DAC, but in general terms would be:
1st: Hypex NC500 with SI 994 op amps and Nord input buffer.
2nd: Tie between Anaview AMS1000 and NC500 with Sparkos op amps and Nord input buffer.
3rd: Hypex NC500 with OEM input buffer.
Clearly, the choice of both the DAC and the input buffer determines the preference. The class D power modules alone are completely neutral.
I find I prefer bufferless Anaview than OEM buffer Hypex.
I like the "tonally enriched" sound of the Nord buffer option.
I think that an appropriate buffer design for the Anaview could also provide the same result as in the Hypex.
If anyone wants more detail, I'll be glad.
Cheers,
Sebastian