I'll add to the Vandersteen Treo recommendations. I'm not sure what the OP's reference to being too wide actually means but they are bottom ported off the bass driver and can be positioned relatively close to the wall or corners if needed. Dimensionally I don't believe they have a much larger footprint than many of the other floor or stand mount speakers.
My system is in a small 13' x 14' room and sound great with all trypes of music and at low, mid and high volume levels.