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.
The two amps that I recall having the most detail were a Levinson ML-23 and a Counterpoint hybrid amp (can't remember the model number).
I'd still be using the Levinson if it hadn't cooked itself to death and wanted $3000 for refurb (I'll save that for my 6oth birthday). The Counterpoint had a lovely sound but I traded it in for something I was craving at the time.
Sometimes I think added detail gets fatiguing if it's really over-emphasis of treble. It takes me long term listening to know what I really enjoy.