Low power- transparency, dimension, dynamics and bass, or...

I've built several mature and immature systems over the years. That’s part of the fun for me. I’m exploring the possibility of getting the three dimensional sound of a monitor, with the tectonic plate shifting bass of a high quality sub. Can anyone speak to an integration point of say 50-80hz where it made more sense to focus on a high quality smaller speaker (in a medium sized room) vs a "full range" (35hz) speaker? In my experience the full range speaker can have more slam but not necessarily the imaging or quality of drivers. The monitor can struggle with dynamics. This also has me considering smaller horns or dual concentric drivers, but would they be difficult to integrate with a traditional sub or two? I’ve always been a fan of class a and tubes presentation but open to ideas.
I recently had a pair of O/93’s with great dynamics and bass to 30hz but disliked the dimensionality and upper mids of that speaker. I value dimension, image, dynamic ease, transparency, warm side of neutral. Trying to keep this speaker adventure under $6-8k used. I’ve talked to a few people that have said forget low power, increase speaker budget and go for Treo’s or a set of bigger Tannoys. Speakers would be 9 feet apart could be 2’ out 2’ from corners/open floor plan to larger space.

Some ideas- would like to hear bigger Harbeths with subs
Try the Soul Supreme with subs?
Arden, or Autograph mini with dual subs never heard Tannoy
Treo- owned older Model 5, 12 years ago for a limited time- tech seems to have really improved.
Horns but feel like the integration of technologies will be a challenge.
Single driver same issue as horns right?