I tend to think of detail presentation as being more in the domain of the preamp. But yes I'm sure the amp also has a lot to say about it.
Streamer/software/ddc whatever -'> conducive transport for detail creation
dac ---> detail 'creation'
dac output stage, preamp --'> hopefully, it is preserved
cables --> hopefully, it is preserved
power amp --> higher probability of a possible bottleneck/choke point pethaps for letting it through, imo
i have some ways of dealing with stuff upstream of the poweramp, not that worried about the same.
The use case is not just for hifi listening. There is a 'hifi' speaker I've been recently using as a monitor as well, recording some things, etc...Hence,...a quest to mitigate any power amp bottleneck, w.r.t the above mentioned (could be in vain...could be not).
But, there have been some interesting suggestions thus far.