Here is what Dan himself had to say:
"These REALLY are KILLER guys! I have been running mine for about a week now and I have to say that they are easily the best amps that I have ever owned. I haven't had EVERYTHING obviously, but below is a list of amps that I have owned or heard in my system:
Atma-Sphere M60 MKII OTL's.
Sim Audio W-3
Bryston (friends amp, not sure of model)
Threshold Class A (Ditto above)
Channel Islands Audio D-100 (Close second to D-200)
The Atma-Sphere OTL's were magical in many ways, but without autoformers or a speaker that is ideally matched to them, they lack bass and detail to my ears.
The Sim Audio was exceptional in all regards, but simply can't hold a candle to the D-200 in terms of power, speaker handling, musicality, etc. The rest of the SS amps that I owned or auditioned simply sounded too sterile, cold or hard to me. The D-100 monoblocks are also exceptiona, but the extra 100W of the D-200's and some differences in design I believe, simply make them a slightly better overall performer. As would be expected, given their higher price point, etc.
I just highly recommend these and have found them to be the perfect match for our preamp.
I don't represent Dusty's products as a dealer and we are not offering mods for these amps. They are simply exceptional just the way they are!
Pretty strong indorsement!