High end Class D amps?

Based on  boomerbillone's comments on the Starke AD4.320 in this thread, and the very aggressive Black Friday pricing of $839, I bought the amplifier and it was delivered Wednesday.  I let the Starke AD4.320's burn in for about 20 hours and spent a few hours tonight comparing it to the PS Audio M700's which are Class D monoblocks costing $3000 and a Stereophile A rated choice. The M700's are rated at 700 watts into 4 ohms vs the AD4.320's 430 watts bridged into 4 ohms. I listened on the Magnepan 3.7's and the amps were driven directly by a SMSL SU-9 DAC streaming over bluetooth and level matched to pink noise at 75 dB.  I fried my Roon Core a couple of days ago and couldn't stream via USB. Bottom line is I really liked the AD4.320's. The have a very dynamic, rich sound while still being very detailed and quite a large and deep sound stage. Bass is tight and impactful without exaggeration. Midrange is warmer than the M700's which tend towards a little dryness. Highs are bright and detailed without any harshness. The AD4.320's struck me as bringing some of that subtle magic that a good set of tubes in my Freya Preamp can offer over its solid state modes. I usually found the AD4.320's to be more engaging and dynamic than the M700's. I generally have preferred the M700's to my Parasound A21 class AB amp with the Maggies except in the mid-range vocals and I think the Starkes bring some of that better midrange while having great bass and dynamics. For the Black Friday sale price of $839 I have no qualms about recommending the AD4.320's and to my ears they punch way above that price. Very fun to listen to.  I would love to hear the opinion of some of the more experienced ears on here that have actually heard the amp rather than just get flamed by all the Class D haters.

@noble100 Hi Tim---thanks for the info. I don't consider myself a new audiophile per se, but in the past, I didn't really pay much attention to specs like I do now. I was a young 20-something back then and just bought what sounded good. As I've gotten older, I've become more interested in what matches better with what and I'm trying to learn from all you guys. So now I have a Luxman 505UXii integrated with a pair of Dynaudio S40s as well as  pair of Tekton Lore References. I alternate b/w the Dyns and the Lores depending on my mood and musical tastes. I love the Luxman but I at times I wish it had some more punch or something. I caught a video on YT recently that had a new Luxman connected to a Pass amp (I think)---I can't seem to find it now. Anyway, it got me thinking about higher output class Ds (like 200+ wpc) and wondered how that would go. I really appreciate everyone's input and suggestions. 

The Japanese company Spec design very well regarded Class D amps that are apparently very valve-like in tone, though they are not the mega-watt things that a lot of people seem to use Class D for.

I have 300W Class D amps in each of my semi-active speakers and they work brilliantly at driving bass.  But the passive end of the speakers I prefer driving with Class A.. It is the perfect combination.

Another vote for Bel Canto.
I'm using the Reference 600 monoblocks as a stopgap to drive my Focal Stella Utopias while i save for Boulder 2160. The fun doesn't stop, i can't believe how well they perform

What an interesting thread. Is anyone using subs that have high impedance inputs, like RELs, with class D amps? Do you notice any difference in the performance of the subs, or an impact on the performance of the full range speakers?