T+A Class D Amps ( M200 or A200)?

Thanks @prophet9 and @goodlistening64 ; very helpful to me.

  @soix, do you think, cost aside, that the eversolo dump-a10 is likely better than the NAD M66. The M66 has also gotten great reviews (e.g., https://www.stereophile.com/content/nad-m66-streaming-preamplifier-measurements-page-2 )

 and has more functions than I will ever use. Pretty solid customer support room, at least based on their being very helpful when i had some very boneheaded questions when setting up the M33.

I really have no idea which is better, but all else equal I’d give the nod to the M66 as the more established brand and Dirac if you might use that.  That said, I doubt you’d be unhappy with either performance wise and the A10 is $3k cheaper, which in my world is material.

Totally appreciate that, thank you, @soix.   I do expect they would both be pretty sonically neutral. The other item on the scale in the M66’s favor (for me) is Bluesound. Probably not worth 3K on its own, though.  But if I were to go through with this, I would hope to do a bit better on price of the M66 via the used market or through “kindly” dealer trade-in concessions.

Good discussion. Your focus seems to be on power amps, and they are certainly part of the equation, but I wonder if the right preamp might make the difference. I realize this is complicated given all the digital you have integrated already, but just throwing it out there. 

I’m surprised that nobody has weighed on the merits or concerns raised by the idea of going with the Jeff Rowland 625 S2 (whether with the Eversolo A10 or the NAD M66 or with some other solid state pre-amp)….