You’ve gotten lots of suggestions and face the typical conundrum of lots of different answers. I understand why you like the imaging of the LRS. I also understand why you like ATC speakers and their precision, clarity and speed. What has always worked for me is bringing gear home and trying it in my room. Each of us have different listening rooms and musical preferences so our suggestions may not closely match what you’re seeking. Find some dealers that will let you bring gear home, whether electronics or speakers and see how they work for you. Many online dealers of both new and used equipment will let you return gear. The Music Room sells both new and used, as one example. 

I hope you find what you’re seeking. 

If the Korg B1 in the Link can be purchased as a fully assembled model, there is a lot to be had for such little monies. I know from experiences had, when used in certain systems, the Pre Amp really makes a very good account of itself.  

As a result of attending comparison demo's, I witnessed the Owner of a System costing more than £40K settle for the Korg B1 over a £4K Pre - Amp when they had about £15K of Pre Amps being A/B trialed on their system.

The Korg B1 took pride of place in that system for quite a few years, it was even more impressive when the Khozmo VC was added and has only very recently been co-joined by another Pre-Amp. The owner of this system now is of the view they have all the Pre Amp they need, with the Two Pre's available. Not too bad a outcome when both are costing well under £1K. 

  https://www.diyaudio.com/community/threads/pass-b1-korg-assembled-50.415820/

you might want to take a look at the reviews for

DENAFRIPS HESTIA 12TH PREAMP

or

Ladder Bach Fully Balanced HiFi Preamplifier R-2R 

@lanx0003 - I don’t like NOS or R2R DACS or Preamps especially for detail. I’ve tried adjusting the filters on my DAC as well as I’ve had the Sonnet Morpheus DAC before and didn’t really care for it. You exchange all micro detail for tonality. When I switched from that DAC to a Schiit Yggdrasil I couldn’t believe how much detail I was leaving on the table. It really felt like a veil was over the music. I think at this point I have to accept the limitations of these speakers and go ahead with their strengths. I’m thinking of getting a Conrad Johnson preamp and calling it a day. At least that preamp should grow with me if I decide to go with some other posters suggestions of going with the brighter Monitor Audio. 

The Magnepan LRSs are, for all I tents and purposes, UNIVERSALLY reviewed as great speakers, especially for the money. The ONLY negative review came from a review based on measurements only lol. If one is rating speakers on based on a bunch of tables and squiggly lines you are absolutely doing it wrong. The only consistent minor negatives were power requirements - and I think you amp has that covered with your amp - and placement sensitivity. It took me about 3 yrs to get my placement right, especially after adding Magna Risers to my 1.7is. Wow , major improvement on what I thought were already  superb speakers. I suspect what you are missing might be satisfied by some Magna Risers for the LRSs (several models to choose from: https://magnarisers.com/our-products.html). Mine are literally perfect for me now. And, as Maggies get on the "Best" lists of most audiophile magazines year in and year out against MUCH more expensive kit, upgrading would be an exercise in futility - except for bigger Maggies lol.