Overkill for small room

EQ + room treatments will be your friend. 

The room treatments will keep the mid-high frequencies tamed, EQ will help you deal with room modes.  You may even consider bass traps.

Also, check out the AM Acoustics room simulator to help you find ideal placements for your speakers and listening location as well as to inform you of where to expect worst problems in bass.

I've had the opportunity to audition the Dynaudio Contour 20i speakers, and I must say, their sound quality is very impressive. According to Stereophile's review, the Contour 20 speakers pair well with two modest class A tube amplifiers (with 22-35 wpc), but they don't seem to favor a 400-watt per channel class D amplifier. This suggests that the compatibility issue lies more in quality matching rather than sheer wattage power. Given that a pair of used Contour 20 speakers is available at half the price of the new 20i model in the market, it's definitely worth considering.

My third system comprising NHT SB3, almost the same spec with 20/20i, performs quite well in my even smaller room.  What has been confined / compromised is soundstage due to space constraint but the rest of sound attributes can be tuned well with care.

Check out the room in my profile; its 13’x11’. I’m using Contour20s powered by a McIntosh 352 IA, 200 watts. Note: I was also using two subs but have since removed the subs from the set-up. They simply weren’t necessary with the deep bass range of the Contour20s. I do have the Contours mounted on the Dynaudio stands with tubes filled with sand for added weight and density.

My speakers are 3’ from both the back wall and side wall and I use sound material on the wall directly behind my seating position. I totally enjoy this space.

Plus one on the Special 40’s.

Oh, and if you’re nuts, welcome to the club.😁

I concur on room treatment, I have an even smaller room with decent size dipole speakers, adding sound treatment to various locations made a huge difference. 
GIKacoustics offers free room treatment advice which I found very helpful.