Floorstanding speaker experiences/recommendations in the $12-25k range

I agree with @audiotroy  I run my Legacy Focus SEs in a room that's 16'x28'x8'.  Loads of bass to fill the room.  Sadly, I was not able to audition Magico A5s when they had just been released due to Covid and all of the audio stores were shut down.  Would love to hear those but they're 2x as much as the Focus SEs!

I was buzzing through the the RMAF years ago listening to a bunch of setups.  After the show I kept thinking the most impressive system I heard was and Octave Dynaudio Tower setup.  Dont even remember the models but of all the gear I heard that was the setup I remembered the most. 

Consider Wolf Von Langa SON speakers. THey are a two-way design with an 11' field coil woofer that specs at 25 hz and a Mundorf AMD tweeter. The field coil allows superb control of the driver. There is a pair on Audiogon now at the low end of your price range. Several awards and positive reviews. THey look small but sound big!

It kind of depends on the flavor of sound you are looking for.  There are those more on the analytical side and others that are not.  Also, are you looking to stay with a box type of speaker or open baffle design.  I listened to about 12 different speakers before I decided to buy the Vienna Accoutics Liszt model (including some of the manufactures mentioned).  I don't need a sub since the speaker goes down to 28 hz.  I listened to older Magicos, Wilson, B&W, Rockport, Vandersteen etc.  My room size is very similar to yours and they are worth a listen.

Daedalus Audio line may be of interest. I've read only great reviews about them, however I haven't heard them. There used to be a buzz in the forums about their speakers.