Strange, a speaker of that caliber should not have any problem with soundstage. I have a much smaller room and yet my speakers ($5.5k /pr) disappears like nobody else. My soundstage is between 1.5ft to 3ft high above the tweeter. The sound appears to come from everywhere except the speakers. It really has to do with speaker placement and room treatment.
Check out the layout of my room here:
http://www.audiocircle.com/gallery/albums/userpics/49166/Room_Layout.jpg
I think more bass trap / acoustic panels will help.
Check out the layout of my room here:
http://www.audiocircle.com/gallery/albums/userpics/49166/Room_Layout.jpg
I think more bass trap / acoustic panels will help.