Speaker height vs ceiling height

Vertical dispersion in lines planars and stats work often in lower rooms. From what my ears say atleast.

Map,
You sure got that right! I heard Audience speakers...the 2+2 at THE in Newport a couple months ago.
5 large, but really special.....

Right in back was the line array of 16 (count 'em.....16) idential drivers. I didn't bother to ask

you know what, take advantage of the situation & use the lower height of your ceiling to make your speakers a line-array-like speaker. Line array speakers use the floor & ceiling to make them appear as an infinite baffle speaker. So, if you get a speaker with a radiation pattern that can make use of the floor & ceiling you'd have a fantastic soundstage height (& depth if you do this right). Line arrays do not have to cost a fortune (but they can). Check out VMPS speakers & those from Selah Audio:
http://www.vmpsaudio.com/
http://www.selahaudio.com/id73.html

I happen to own VMPS FF3 SRE speakers in a drop ceilng basemant and at 68in tall with the ribbon mids they work great in my 14x24 room.