I’m in the amps sound similar camp, especially after doing my own blind testing (which was a revelation). I think the Ncores and Purifis have essentially solved any deficiencies. But one thing I will certainly concede: an underpowered class D amp is a horror show, and you probably need more rated power (since the D amps are not rated on continuous power like AB). But these more recent modules have plenty. I use an NCore module design with my Harbeths and it works beautifully.
One thing I find reprehensible is the way the big names have added all kinds of tweaks to Putzeys’ design (op-amps, power supplies) that are completely unnecessary, or even cause spec deterioration, so they can charge more. Even his own Mola Mola seems gratuitous. A clean custom-build, like March Audio, is much cheaper and arguably better-performing than the more expensive name brand versions. Of course you give up the credit behind the warranty (Alan March is a one-man band), but you could get twice as much amp for the money, and Alan’s been around a while.
One thing I find reprehensible is the way the big names have added all kinds of tweaks to Putzeys’ design (op-amps, power supplies) that are completely unnecessary, or even cause spec deterioration, so they can charge more. Even his own Mola Mola seems gratuitous. A clean custom-build, like March Audio, is much cheaper and arguably better-performing than the more expensive name brand versions. Of course you give up the credit behind the warranty (Alan March is a one-man band), but you could get twice as much amp for the money, and Alan’s been around a while.