I downsized from a 12 x 11 x 9 to even a smaller room. I had the ($1000) Magnepan LRS+ in the bigger room and it was really good. It lacked some details that I was used to in other speakers, but overall, the presentation was so impressive.
In my even smaller room, I have the (used $1000) Magnepan Mini. I use the KEF KEC62 sub with this system and also the LRS+. I am doing near-field listening (see my office2 virtual system). The Mini sound better than the LRS+. The missing detail is there and the soundstage and presentation is the same but in a slightly smaller scale.
You do need power for both Maggies, and I use the Sanders Magtech amp (500 | 900 @ 8 | 4).
BTW - Yesterday I added a barstool to the room and put the KC62 sub on it. It is now at the same height as the Mini panels which are on stands. I think this is going to be my long-term setup. I like the bass this way.
BTW2 - another killer small room setup is the KEF LS50 META + KC62 sub (around $1800 used for both). I had that before the LRS+ and it had more detail than the LRS+ but lacked the wall of sound effect of the Maggies.