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

Consider future system changes. If you limit yourself to choices of high sensitivity/efficient speakers, then, now and/or future, you will be able to use lower power amps successfully. Then your amp choices become many, opportunities for a great deal for one increases, saves money, space, .. that opens the options to tube amps. Not only are tube amps lower power, among them, the cost reduces as you reduce your power needs.

A system of monitors without too much bass, properly matched to a well controlled self powered sub woofer will make imaging easier, as the monitors will make narrower sound waves, narrower faces, improved imaging, less room interaction. 

Powered sub-woofer also helps you use a lower power amp, as most power is needed for controlled bass.

You can upgrade the monitors and/or subwoofer separately in the future.

Take your time, it is work to get a setup with sub-woofer right, but, then you get the advantages I mentioned.

A lot of recommendations for speakers that are still too large for that size of room IMO. I'd stick with speakers no larger than the size of ATC SCM11s. Their sealed box will make them placement friendly. If an in-home audition is not an option, I'd probably choose those or the new Spendor Classic 3/5s. 

Augment the low octaves with a DSP-adjustable sub.

I am pretty proud of these and we received spectacular feedback during AXPONA.  I am currenty waiting on parts from Europe but will be back in stock in a couple weeks. Great soundstage and true sound reproduction.  If you are interested I might be able to express in parts.    

https://verdantaudio.com/collections/verdant-audio-speakers/products/blackthorn-1-standmount-speaker?variant=26459232567396

If you are not going to move, the electrostatic Martin Logans have a small and musical sweet spot.

I have some Watkins Generation Four.  They work great in a small space.  I bought them on trial planning to return them.  I immediately knew that was not going to happen.

I second: Fritz Carrera BE. Own a pair in similar size room and at 86db will drive almost anything with unbelievable imaging and solid bass to around 37HZ. And Fritz has 30 day trial period with full refund....how can you go wrong!