Obviously, there's tons of options...yet some obstacles and better chioces to consider for your tiny room.
Acoustically, that room is heavily challenged, and listening possition if limited. You will have to consider teh sonic integrity of the room from an acoustic standpoint as well...seriosly. More diffusion however is needed in that room overall, but maybe a couple of absorbtion spots if you could.
Back to the gear..You need to consider smaller bass limited speakers if going floor standers, unless you can bi-amp, and effectively get some sort of Parametric EQ on the bass woofer for larger speakers. If you go much more bass limited designs, you may get away with being able to deal with the "small room boom" and peaky unatural sound that tiny room offeres(I know, I've done many rooms like yours).
Smaller Thiel 1.6's would fit into that room with descent enough results with careful set up of speakers and chair(whatever). Tube gear will work superb with a strong amp section(4 ohm). You don'to sound like you need lots of thunder and rock and such, so bass limited would be ok I suppose. You could add/EQ a sub into the system if needed(I doubt you would).
Another option is smaller stand mounted monitors. The higher end $4K and above Dynaudio's (I think use the Essotar world class tweeter) might be an option in their highest end series. I've heard good things there.
In that case, the Musical Fidelity integrated at $5k new is the way to go there!...extremely refined, musical, and transparant sounding!..one of the best I've heard(and I've sold Pass, Krell, Ayre, Meridian, Plinius, Coda, and similar over the years in SS..that' piece is great!).
You might consider finding the speakers you like, that fit sonically best into that room(remember larger speakers will be a chore in your room to get sounding balanced and non-boomy!), then tinkering with different amp/preamp combo's.
Also, if you go tubes, consider that the room will warm up REAL FAST without proper ventilation, as with Class A SS amps. So consider.
AS for Digital Front End's and Tuners, it's hard to beat the relatively cheep used Sony 777es SACD players(retailed $3500 new) for CD and SACD. You could tinker with separate pre/pro's or read reviews on new "all in one unit's". Basically Digital processing has gotten superb comparatively, and not likely to improve so much for 16 bit cd's as they are. As for tuners, the hands down cheap choice is the Creek T43, as $700 new!..it's superb, if not darn near world class. I've heard much more expensive that weren't as good!..it's truely top notch and worth a try before spending big bucks..also, get a Dynalabs ST150 antanae.
Your interconnect choices will depend on the gear chioces. I like Acoustic Zen for the money/performance overall, but does depend.
Bottom line...you if you already have gear, you should try some speakers, maybe on the used market. Again, you will much more easily get good results with set up with smaller speakers in that room. I've had great succes with modest smaller speakers from Merlin TSM's, to Theil 1.5's, Sonus Minima Amators, and similar. There's a lot out there, but you gotta try something!(there is no magic first shot answer usually!...gotta take the time).
Still, the Thiel 1.6's should be one of the best speaker choices for a world class passive monitor. Also, you might look into what ATC offers in ACtive speakers, where you mightbe able to do some room correction(?), have active speakers, and get some world class sound. Not sure, but I know they make at least some world class offerings. Just not sure of price ranges and offerings. Still, I like what Active speakers can potentially offer(although I never liked any Lynn or Meridian speaker!..but I liked their gear)
Also a considertion for your needs might be some of the older Apogee panals that they made for the "Mini grads" and such. They were ultra clear, refined, detailed, musical and big sounding for what you are likely after sonically. They are also quite bass limited(good for your room) without the woofer pannels.
I thought of this because my buddy used to own them, and they were very nice.
Anyway, The smaller Totem Manni 2's aren't anything so special in the tweeter, the Merlin TSM's are just descent. The Dynaudio's are really pretty nice on the $4k and above side. The ultra high end Sonus's are very musical and refined sounding. There are a number of smaller high end "small company" offerings I've heard that are really world class sounding..but forgot the names. I've heard many at the audio shows I've attended.(you might check the CES show reviews in the audio mag's, and "hi-fi show's" articles in similar for ideas. Some companies will even let you audition first. Hummm...
Anyway, The Thiel 1.6 is really a good inexpensive marginal class A rated speaker, that shouldn't dissapoint if set up right. I like this over the very nice sounding Sonus Faber Grand Piano(belongs in high class B), Revel M20's, Audio Physic's otherwise excellent Virgo's(close call), etc. I just like what the 1.6 Thiel offers musically.
Another option is to find a pair of Celestion Kinston's!...Truely a top caliber speaker at $4k new(not sure if they still make em).
Anyway, if you do some reading/research, you might come up with more. Still, you likely won't go wrong with what I mentioned.
Front ends are PLENTIFUL, so read there as well. Tuners are trial and error as well, but not as critical I think.
Good luck
