Focal Kanta 2 and CODA 16 amp

Hello All,
My audio system was sounding really good but I felt the need to go further and recently upgraded a McIntosh MC152 amp to a Coda 16. What was missing? A certain bit of clarity, the ability to place instruments in the soundstage, and an amp that is consistent in quality with the rest of my equipment.

McIntosh is one of the amplifiers that pairs well with my Focal Kanta 2s. I thought about a more powerful McIntosh but didn’t go there, heard a Luxman M900u in a dealer’s showroom that was OK, but a demo of the Coda turned my head. The Coda is an eye-opener in the clarity and power it brings to the system, but it has thrown the balance off. I am now struggling to overcome some brightness with certain music (not all), a slight edge that I had previously managed to defeat by changing cables, rolling tubes in my preamp and adding the Mac.

My listening space is not ideal and can use acoustic treatment to tame the highs, but things sounded pretty good before. The focus and bulk of time (say 85%) is with home theatre, but when I play two channel, I want it to be high quality. An obvious path is to correct my mistake, sell the Coda and look elsewhere.  Another alternative is to keep this excellent amp and get a different (warmer?) preamp to better match the Coda (must have HT bypass and XLR connections), or perhaps something like a MiniDSP with Dirac to tweak the sound. I'm even contemplating warmer speakers to replace the Kantas, but that means three speakers (L/C/R) for home theatre.

I appreciate any words of wisdom or solace from Kanta and/or Coda owners on a strategy to manage this issue. Thanks,
Robert