Is there a point of diminished returns with amps and Harbeth 30.1s?


I’m currently using Herron M1As with my 30.1s and I’ve upgraded the rest of my system (Aries/Fatboy/SUT/DL103r and Lamm pre and phono) and each upgrade has been VERY satisfying. So is it going to be worth spending $5000 or so on the used market to upgrade the Herrons? Any thoughts as to whether I’ve reached the apex of amp/speaker performace for the M30.1s?
dhcod
@honeyooi been down the cartridge route. Spent thousands and always prefer the tone of the 103R, although now I use an Anamighty-built one that costs quite a bit. I have never found a cartridge that duplicates that tone…. with the right SUT of course.
You're not going to get noticeably "better" by changing the amp; you might achieve something "different" (or it might sound remarkably similar).
If you have the urge to tinker, has the room had acoustic treatment?
agree with @twoleftears

to me the mon 30’s have a particular sound and tonal palette, those who love it will generally not prefer more tonally balanced and extended-range speakers that don't accentuate and emphasize the midband as much

good solid state amplification with some tubes earlier in the chain is the best way to get them to sound great
My suggestion save more money and get that LAMM ML1.1 .
with same manufacturer you got better synergy and full tube amp Lush .
but is hot though, But worth it .