What is the best loudspeaker for a small room?

System audio SA2K.
No comparison to anything.

With your equipment Revel Studios Used for about 6k. I have pass equipment and the lower line F52 in a room 18 x 13 x 8

They sound superb

I need to chime in here because I have a similar sized room and feel it is small. I sit approximately 10ft. From my studio 20's and couldn't imagine bigger speakers in such a space without being overwhelming.

You should listen to YG Carmels- there are several floating around used for 1/3 the original price. Very revealing yet not fatiguing. Easy to drive and will not be outdated with future front end improvements.

It was not mentioned pricing ? The YG Carmel's are. Excellent choice if you have over $15 k to spend ,and need. Quality sub if you want the last octave
Of Bass.
Th New Marten Duke MK-2 at $8500 retail, is a great monitor and in my opinion a more musical speaker then the $25k plus Magico , get a good sub you have a reference full range setup for well under $10 k with discounts.
Svs has an exceptional new 13 inch sealed sub for 1,500.
If money is tight the new Revel M 106 monitor which I own ,with a svs sealed 12 inch sub
Is. Great combination for under $2500 for the system and is a steal
For the price look for a review in TAS magazine in the next few months.