I think alot of the amps mentioned would serve you well with some sounding smoother, some sounding grittier, some extenuating some frequencies over others.
That said, I use Focal speakers which have a 90 dB or better in room response. Hegel and Focal seem to go very well together. But I have hooked up a Keces E40 integrated amp (34watts@8 ohms/ 61 watts@ 4 ohms) and at the volumes I listen to I find it extremely satisfying at the volumes I listen at. It’s sound quality is very much like my hegel and new, last I checked costs $630 delivered. The Hegel weighs 42#...the Keces E40 weighs about 10#. The Keces E40 is stated to be capable of up to 15 amps per channel for bursts should the speaker require it. My Hegel is probably about 35 amps/channel. But the little Keces does it for me.
Keces also makes a 100 watt power amp that rates very highly but costs much more. One of these days I’ll list the Hegel. Overkill for my "large" bookshelf speakers. Good luck in your search.