Help Deciding On New Speakers For Small Room, $10k budget

@cookiecurls wrote: "The room size is 10 feet by 11 feet with 10 foot ceilings, almost a perfect square".

This makes me think that a somewhat unconventional set-up geometry might be worth considering: Perhaps with the speakers and listening position oriented almost, but not quite, along a diagonal. This would help to smooth out the in-room bass in your almost-cubic room.

@cookiecurls again: "I also have a Rel A7X subwoofer" and "No [placement] limitations, it’s an empty canvas."

I would suggest main speakers whose low end overlaps the subwoofer somewhat, such that the subwoofer is augmenting the low end rather than being the sole source of low end energy. And, I would suggest elevating the sub so that it is closer to the ceiling than to the floor. Combined with not-quite-diagonal speaker placement, this approach would result in your three in-room bass sources each being a different distance from the nearby room boundaries, with good distribution of your bass sources in all three dimensions. 

Does your subwoofer have a phase control?  A phase control is often useful when there is overlap between the sub(s) and mains.

@cookiecurls: "[The room] has already been professionally sound treated with many panels from Gik Acoustics."

Which types of panels, and can you relocate them if you wanted to try the almost-diagonal setup geometry?

One final question, which has to do with spatial quality preference: Are you more interested in a "they are here" presentation (it sounds like the musicians are in your room), or a "you are there" presentation (it sounds like you are in the musicans’ room)?

Thanks!

Duke

Especially since your room size and sensitivity to highs, I would recommend Electricic Solution rebuild of Quad 57s. They are a bit rolled off in the highs but don’t have very strong bass, But for what they do it is clear why they top most lists of best ever. Also seems you have a great amp for them,

And if you want similar mids with good bass and more highs and an overall more dynamic and real sound, the new Quad 2812X. They are a steal at $10K. The 57s are just $6500. I replaced mine with the new Quads. I miss the sublime 57 sound but am enjoying the more exciting sound of the new Quads,

I am also a musician and love the real and transparency of Quads. Would never have any other!

@cookiecurls you already have received some very good recommendations. I agree with those who suggest one of the BBC models. When I moved nearly a decade ago into a home with a small dedicated listening room, I had opportunity to build a system specifically for the space. Like you, I’m sensitive to high frequencies and lean toward warmer presentations of music. After an exhausting and exhaustive review of every stand mounted speaker at AXPONA, I decided to bring home a pair of Reference 3A MM de Capo BE speakers to audition. At the show, I thought they offered a more perfect balance (to my ear) of accuracy and warmth than any of the others I auditioned, many of which are suggested above. Reference 3A is not well known, but they have been around a very long time and are well regarded. The last I looked, they were less than half your budget. By the way, I recently added a pair of REL T7x subs to my system; they play beautifully with the Ref 3As.

Given your requirements especially in the treble:

odyssey audio Lorelei. $2900 and add a Rythmic sealed sub or two, if needed. 
 

https://odysseyaudio.com/lorelei-floorstanding-speaker/
 

++++1 for Joseph Audio Pulsar Graphene if you choose stand mounts, they have been stellar every time I have heard them (dealer demo, audio show, or friends home)....and they seem to be a little more forgiving of electronics

If you like horns or horn  hybrids, the Volit Lucera speakers are brilliant.....and amazing at placing you in the music. Downside: you will not be able to demo them, they are floor stand speakers, and at $11,5000.....$1,500 over your budget.

My next speakers to add to my collection (as of this writing) will be one of those 2 speakers.