Speaker recommendation - 3K budget

I think I'd avoid the ML's for this application. Although they do meet your requirements, I doubt they'll be very good in your room: it's too small, especially if you have to put office furniture in it. MLs just about have to be 3-4 feet from the back wall, and in a 11x12 space that's a major disruption. (I am a big ML fan and my main system is fully ML, it's not that I don't like them.)

My first thought was a used set of Magnepan 3.6Rs, but they will have a lof of the same problems as MLs, and they are even bigger.

Go check out the gold series from Monitor Audio. Fantastic! Good luck

After home auditioning the ML Aeons, Thiel 1.6's and the Thiel 2.3's I went with the Thiel 2.3's

They are absolutly beautiful! They re-create music like no other speaker in this price range or even much higher. The build quality is perfect and the drivers are top notch.

I also auditioned speakers from Sonus Faber (Pianos), Vienna, B&W, Energy Veritas, Boston (NOT!!!), JM Labs, Monitor Audio Gold, and a few others.

Oh yeah.. Thiel also has the best customer service and a 10 year warranty. THE END RESULT IS QUALITY PRODUCT.

Why not Nautilus 804's. I wouldn't go bigger in your 11 x 12 room.
Aerial Acoustics are nice without quite the resolution of Nautilus series.
Harbeths are another choice but hard to find. Again, not quite as detailed as Nautilus from what I've read.

An easy recommendation, Magnepan 3.6s. Though you will have to dig a little deeper in your pocket or, purchase them used. The Maggies produce a big dynamic soundstage that exudes reality in abundance. The bass is tight and defined, and the mid-treble range is delicate and delineated. Its a superb speaker but don't squeeze it because it likes its room.

If you must have a box then look at the Thiels. The 2 series should be in your price range. I have owned three sets of Thiels over the years and all were excellent. They are extremely coherent and resolving. The soundstage may not be as large and voluptuous as the Magnepans however; instrument placement and detail seem to be on par. The Thiel coherence is every bit as good.