I have mine in a 13' 4" by 23 room and they work great. The way you describe your room you have similar space to fill.

People with 12 by 14 rooms are deciding to try these. They are too loud for my taste with the smaller room. I know, just turn it down. The thing is they don't sound "right" until they use a little bit of juice. To give you some idea of how little they take I bought an old Luxman amp with l.e.d. power meters starting at .8 watts. I have to "turn it up" to find out the meters work.

I went to Lima Ohio and saw some Edgar horns and many other high efficiency offerings. The high efficiency all have that great knock you over with a bass wave, fill your house sound.

No regrets with the Pi's though. You're looking at some nice speakers here.

Grant.