Warm romantic & detailed

Duke, I think 545's are over his price range which is why I mentioned the Maggies. The OP can certainly add one of your Swarm systems to the Maggies.

I am not either a Sound Labs, Magnepan or Audio Kinesis dealer. I have no relationship to any of these people. Not that I have not tried but they generally run in the opposite direction. Must have bad breath. 

Yes, I wasn’t trying for the BBC curve. I use a 1db drop from 1khz to 20khz but my speakers are very flat through that range which is why I suggested maybe up to 3db or just get some Revel 228be. If we could see a graph would help a lot in figuring out where to adjust. Looks like he's tried room treatments taming that harshness with PEQ is probably the easiest. If you use roon you can try REW and load the filters in roon. 

Taming qualities you don't like from a speaker is a losing battle.  They simply need to be replaced.  Sounds like you have some good recommendations from others.

Spendor SP 100R or the previously mentioned Harbeth Monitor 40.

Having 20 + years rebuilding,upgrading loudspeaker Xovers 
The weakest link in the vast majority of speakers is the Xover .
I have seen $50x speakers with $10:Solen capacitors Go to Humble homemade Hifi capacitor test , the capacitor bible 
modt havedapacitirs rated around a 6-7 ,top caps 11-15.
even resistors most use crappy ceramic ,path audio best made today , for NOS before Millsmoved in 2011 made in USA Mills grea5 resistors still using Silver end caps. And quality wire, Cardas or wbt, Mundorf silver solder, inductors cheap sledge hammer 
many 7nder $10 k use Jantzen Copperopen coil excellent for the money . If keeping your speakers upgrade them ,and get rid of the stock junk gold over brass ,brass is bright a good WBT loudspeaker connector , or Cardas gold copper . That’s my opinion after 40+ years in Audio.