how big a speaker can you put in an 11 x 11 room?

I have a 10x10 room with 9 ft ceilings and am using Vienna Acoustics Beethoven Baby Grands . This switch to a smaller room and nearfield listening is new to me. Having less side room reflection has brought much more musical enjoyment.
Good luck
Vienna Acoustics
Beethoven Baby Grands
W x H x D 8.5/40/14.75
2x6 woofers
6" Midrange
1.1" Tweter

If you size your choice accordingly, you could easily reposition your speakers to voice out the 6ft opening when entertaining in that area. Mobility of previously mentioned sub unit (great suggestion BTW) would be helpful too since some feel a sub can be very directional above an 80Hz x-over. Practicality of gear location and cable runs will come into play of course. If there is any chance the system may end up in the bigger room someday, that may seriously influence your choice of speaker.

Thanks....I presently have Virgo IIIs which do a nice job, though, i have become a huge fan of the Elipsas and the Revel SAlon2s so I have been ready to upgrade...but I dont think either will lend to the room...though I am a big fan of nearfield listening..the Elipsas are warm...in a room this small they may be a bit heavy...

OHM Micro Walsh Talls

My room is a 11X12X9'ceiling(huge)and I have Revel 50as+a revel 50a centre speaker,I'll put it this way,
I have four component racks(full 3X7bssts+2X4Bssts,cdr,cdp,clearaudio championII TT,2-Torus units,Arcam prepro av-8 and Arcam-139 dvd,and 2X Velodyne DD-15s.the racks take up the one wall with just enough room for the mains,I have one sub almost halfway along one wall and the other almost behind the couch.I like what I'm getting for sound,but I'm sure with a bigger room it would be way better.when we do get a bigger house,I know I'll be ready.