And... here's another review of the Harbeth P3ESR XD that you'll find interesting - especially regarding the matching of amplifiers... (if you haven't seen it).
In near-field listening - it's not about the volume produced by the amp, so much as how it drives and controls the speakers and the impedance matching, etc.
This guy's comments are very enlightening in that regard - which are from a studio sound engineer's perspective.
https://www.youtube.com/watch?v=n1gEKirmnHY&ab_channel=PassionforSound