@bartsw -- good point about preamp. Same applies to DAC and/or streamer. Those can and should be "voiced" in whatever way the user most appreciates, and that sound will carry through, to at least some extent, through the amp(s) to the speakers.
Another point about amps in general: historically in big, powerful SS amps, the same sonic divide existed in the range of amp sound users like. Some seek out amp designs that are "neutral," "flat," "accurate," "high resolution," etc. Others like me seek out amps that sound closer to how music IRL sounds, in terms of tone, timbre and presence of some foundation warmth. This divide exists in class D amps just as it does in class A and A/B amps. I need a class D amp due to space limitations on my desktop, also because any amp that throws a lot of heat in this home office just jacks up the temps and makes me pay for more AC to nullify it. Even so, a class D amp that sounds bright and edgy (something class D amps in general are sometimes accused of) would do me no real good.
I managed to find 3 class D amps that, at least to my ears, sound quite good. They have their own "sound," and it pleases me no matter what gear is upstream. But there’s also no doubt these class D amps can create synergy with my NOS DAC, also chosen for its musical sound. And depending on which preamp I use (multiple options), both the class D amp and NOS DAC may lock in with the preamp.
It’s all about "color, bass and detail" (well said).