Howdy!
I like ribbons too. For your bad BW experience, all I can is that the room is everything. Ok, that includes where the speakers you go, and where YOU go in it as well. I've heard BWs that sounded really fantastic, and then an even better model in such a terrible room, that I thought the tweeters were blown. I even asked the dealer.
As for your room, it's probably a good thing it is open, since square dimensions are the worst for acoustics. While your ceiling isn't 20 ft high, I suppose being exactly 10ft high is not the most fortunate dimension either, but whatever.
I see lsiberian just beat me to it, but I would also consider JL when size/performance ratio is the #1 factor. They seem to be selling often for about 1.2-1.4k at audiogon, whether as brand new or used.
Do the speakers HAVE to go into some cubby hole? If not, you could try some towers w/o sub to begin with as well, though you won't really get LFE (if you choose to, it will be minimal). I like ML, and their ribbons are indeed made by BG. Another brand I think of with ribbons is Salk, but the premium with adding the ribbons is pretty high, IIRC.