Speaker Choice ?

Along with Jmc's post, I'd add that most. Speakers will work in that room. My room is 22 wide, 18 deep with cathedral ceilings and I use 5 1/2 Fostex full range drivers with a couple of 8in subs. Sound easily fills the room and the kitchen/dining room behind the front wall. I listen to mostly vintage rock and its offspring. A 35 watt tube amp drives my 95db speakers.

Jmc-what I meant was there's a lot of flexibility in placement options. Of course, the equipment will make a difference. I'd rather have a larger room than a smaller room.