Monitor with good midrange dispersion-

I'm looking for a pair of monitors to sit on the balcony of my large 24X22 foot room with 17 foot celings. My main speakers are Green Mountain Audio Imago's, which I love, but need a second set to completely fill the room with sound. Real low base is not important, because the Imago's have a great low end. I'm looking for a monitor under $1000 that provide room-filling sound. Any suggestions would be appreciated. - Lee