The best speaker for a small room...at any price point.

Lenehan Audio ML1 or ML2 reference. I am currently in an apartment, so I have my ML2's in storage. I have my ML1's on springs for both sound quality and it decouples them from each other and the floor. Helps keep the neighbors happy :-)

They sound great with upgraded Prima Luna Dialogue Premium HP,
https://www.stereo.net.au/forums/topic/242616-primaluna-premium-hp-integrated-cap-upgrade/

There are many reviews, like:
https://forum.audiogon.com/discussions/review-lenehan-ml-1-monitor

If you want to know more, or who nearest you may have them?
Ask Mike which recording studios use them, and the older ML1 vs Magico Mini's in NYC. I don't know of more recent comparisons, sorry.
mike@lenehanaudio.com.au

There is probably no "direct" answer as a soundsystem has to be seen as a whole, including the acoustic characteristics of your room and your personal tastes!
I love the Dynaudio Contour 20 on my friend's Krell KSA-100s amp + KRC3 Preamp, Ayre QB9 DAC.  Il like my Ryan R610 coupled with my Rega Elex-R amp + Rega DAC-R.

ProAc D2http://www.theabsolutesound.com/articles/tested-proac-response-d-two-loudspeaker/

I used to have B&W 802D in 12x13 room. They sounded excellent at 7 feet from my chair with condition that most of wall space was covered with acoustic panels.
Most KEF speakers (starting with LS50) will work in small rooms too. QUAD ESL line is DESIGNED with small room in mind.

I also have KEF LS3/5, and I don't miss anything when playing acoustic music.
Kind regards.