If you had to choose...

Why not move up the ATC line?  My wife's system has the ATC 20 passive on Sound Anchor stands with Herbie's Fat Dots and they are haunting (disappearing), dynamic and wonderfully balanced.  Driven by Luxman 509X.

I've nothing more to add as I've no experience with your stated candidates.  Best experience finding your happy place.

I have Fritz Rev 7 SEs that I run in a small listening space not much larger than yours. I often listen at volumes lower than 65db, in fact I’m listening right now about about 45-50db and they sound fantastic. Even at this level they disappear and have a wide deep soundstage with excellent detail. They sound even better turned up, but they do very well at low volume. I would highly recommend Fritz speakers for what you are looking to do.  I have similar musical tastes and they excel with these genres.  Honestly they do well with anything I listen to regardless of genre.

Thanks everyone for all of this fantastic advice.   This is all very helpful.

I hear you all on the efficiency.  Yes, I listen at around 65db, for many hours a day and night. So, sound quality at low volume levels, and avoiding fatigue are top considerations.

@oddiofyl thanks for the review on the Revivals.  FYI, fellow Audiogoner nonoise wrote up an awesome review of the Revival Audio Atalante 3 for anyone interested entitled "Shout out to Revival Audio Atalante 3 speakers" 183204-355

@hilde45 - Thank you for the reviews and for the heads up on Carrera's bright tweeter.   That sounds like a non-starter for me.  I am listening easily 12-15 hrs a day.  I will speak with Fritz and get his thoughts as per your suggestion.

@zlone, @soix  Yes, I have read similar comments about the Alyssa's, so maybe not ideal given my current environment.  And I have added Reference 3A MM de Capo BE to my list!

@mofojo - Yes, I have been eyeballing the Heresy IV.  I forgot to mention that, so thanks for reminding me! This company has haunted me ever since we'd cut school and sneak a listen to Bowie on a friend's dad's Klipshorns (AK-6?) in the mid 70's. Blew my teenage mind!

@knotscott - Agreed, I will initially keep my ATCs for comparison, then if all goes well, then maybe sell them.  Yes, it is such a personal choice. So I am very appreciative for everyone's perspective.

@mashif, @celtic66   -  I have thought about staying in the ATC family. When researching ATCs for my purchase a few years ago, I seem to recall that the 19s just had a larger woofer than the 11s, otherwise very much the same, but I could be confused. I can't fit floorstanders, so the 40s wouldn't work. The ATC 20's are over my budget, unless I could find a super used deal... I do think though that my 11s prefer a bit of a higher db level than 65db to really shine.

I have been very happy with my ATC, just wanted to see what else is out there, given my listening space and volume levels.

Maybe I should just figure out a way to keep my ATC in addition to getting new ones!

Thanks again everyone.  I really appreciate it!

Cheers.

Thanks jastralfu.  I saw the Rev 7 SEs and the Ls7s on his website and was wondering about them, in addition the the ones above.  I will discuss these with Fritz as well.

Studio Electric M-4.