What is the best audiophile speaker for a tiny square room?

@chungjh Great that you got panels coming your way. It will open up a world of possibilities for your speaker selection.

I chose the Thiel CS3.7 because I always wanted it. It was my second favorite all-time speaker and a local sale came up, so I went and picked it up. I would be reluctant to buy a used unit that needed shipping. The original packaging is now old.

The Thiel CS3.7 has a bit less bass than the speaker i was expecting to the get for this small room, the Yamaha NS5000. Both speakers sound best in a larger space but the sound I have now is very good. I think once I get the DRC implemented I will have excellent sound. I may have to spend another $1000 to fix my driver issues (with OEM drivers) but this speaker will be my, "to the grave office speaker", so I want it perfect.

Some other floor standing speakers that I demoed and now know they would fit my room were:

Vivid Kaya 45
Paradigm Persona 3F
Magico A3
TAD ME-1 (not floor stander)
Yamaha NS5000

BTW - I started measuring my room with a Minidsp mic and the REW software running on my Windows laptop. A lot of great info can be gained especially for folks like us in small rooms. This was how I discovered a problem with my driver though I cannot hear it.

Amphion are a unique speaker using a matched waveguide voiced to work in almost any room and a rear tunedBass radiator 
using world class Seas drivers ,used by many recording studios 
for accuracy and musicality .I am using my modded Argon 3-S monitors 
with Svs 3000  SB subs which btw are the best sub by a country mile in its price class and much more , it’s a fantastic combination 
That makes a great fully range setup that can compete with floorstanders several times its cost.

Dutch and Dutch 8C

State of the art actives designed to be placed close to a wall and built in DSP. I have mine in a reflective 10 by 10 room where most other speakers are doomed to fail, but they sound outstanding. The 8Cs can go almost anywhere and do very well.

Earphones with accompanied amp

Keep the SoundLabs, upgrade the amplifier!