Right now, I am toying with having parallel music-only and a HT-only systems in my living room.
Given that I would have a system dedicated to music reproduction, I am entertaining using Klipsch for the HT end of things.
I have the RF-82 ii series, which is not ideal for music (although I have a friend who had paid close attention to set up and using judicious toe-in to take the edge off has gotten pretty good music capability out of them). However, I find that they give an exciting presentation which is wonderful for something like Avengers where there is lots of action. I do not have complaints with "the Klipsch sound" from a typical movie where I feel the dialogue is more clear than many speakers that do music better. If it was a heavily music oriented movie, I would switch to the music system.
So I fully understand where you are coming from on music.
Personally, I found the RP-280F comfortable for music (not ideal, but I did not feel like I was being assaulted by them!).
My exposure to the newest RP series was very brief, but compared to my expectations (for Klipsch) they were surprisingly laid back, and I felt it reflected a substantial change in Klipsch's design philosophy.
Here are my thoughts after I listened to the new RP-600m:
https://forums.audioholics.com/forums/threads/polk-audio-vs-klipsch-syndrome.113192/page-12#post-1287795
Reading this today, in retrospect, my comments may have been a little biased by my expectations of a Klipsch speaker. They may not really be laid-back, only laid-back relative to my "Klipach expectations".
I'm not sure how well the new sound fits into their "Pissing off the neighbors for 60+ years" philosophy!
Looking forward to seeing James' measurements and discussion!