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

The Digital Amplifier Company 2Cherry or Meagaschino amplifiers would be a perfect match for your Sound Labs. Tommy does extensive listening and measuring with different types of speakers, one is a large Magnapan. I have had a number of his amps and Dac’s over the years and currently using a 2 Cherry on my Charney Audio Companion Horns. DAC offers a 30 day return policy.

If you are considering a different speaker for your room look into the Charney Audio Maestro Horn with the "Voxativ AC 2.6. They are designed for smaller rooms like yours and deliver on all counts.

Hope you find what your looking for.
https://www.cherryamp.com/

http://charneyaudio.com/index.html

Time to move.

For a small room and near field listening, nothing beats the Audio Physics Step. No longer available but worth seeking out.

my dedicated music room is a pretty reflective cube, 11x11x11. with a carpeted floor, no treatment.  I have two different systems that work great in that room.  First is my PrimaLuna DiaLogue HP (75 watts of tube power with the stock tubes) powering my Focal Diablo Utopia III's with the Focal Stands, through an MSB Analog DAC.  The Focal's are about 2.5 ft from the back wall, 8 ft from my listing chair.  Sound fantastic.  

The second system is Joseph Audio Pulsars, powered by a highly modified Plinius SA 100 Mk. III by Galbo Audio Designs, which also sounds fantastic.  I keep going back and forth on which I prefer.  Neither is really "better," just different.  I use a REL subwoofer with both systems. I would highly recommend either choice for a small room.  The Focal's are less forgiving on crappy recordings, while the the Pulsars have more bass and are better with bootlegs and that sort of thing but not as good on well-recorded stuff.  But it is a minor difference.  I am happy with both, so its hard to decide which to part with!