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

Raidho D1.1's.  Absolutely amazing and perfect for a smaller room.  If you want slam type dynamics, maybe another choice.  Maybe the Magico A3's.  I would also audition some Harbeth's or DeVores.  Depends on the type of music that you like to listen to.  I own the Raidho XT-2's, which I love, but with an unlimited budget would go for the D-3.1's, which are considerably more $$$.  That is my dream speaker.  I listen to all kinds of music, from hard rock to acoustic and even some classical.  But on my Raidho XT-2's, on good recordings, there is the "they're in the room with me" type sound.  Fantastic.

Small Maggies.  

Limited deep bass, to minimize the impact of room nodes down low.  Cardioid dispersion takes the side wall reflections out of play.  Gentle top end for natural octave to octave balance.  Excellent performers in pretty much every respect (assuming there’s enough grunt from your amp).

@firsnot. In the area that I live, a speaker, basically any speaker, is a mere fraction of the price of the room. Therefore, the budget for a speaker (any speaker) that would work in a small room is nothing compared to what a large room will cost me. If that makes any sense to you.

 @keithr  Unfortunately, i wasn’t that impressed with anything at the show (particularly suitable for a small room).The Magico M2’s were ok, but I suspect too difficult to drive with the kind of amps I prefer.