I have been amazed by line sources for a while as they are less dependent on room coupling. The line source speaker I am considering specifically is the Adyton Imagic 2.0TC speaker, made in Norway. It has no crossover or passive components in the signal path which minimized loss and increases dynamics. On their feet they are 7ft tall but only 4" wide.
You can see a picture of them here: http://www.audiocircle.com/index.php?action=gallery;sa=album;id=1878#
The 2.0 model is the tallest, the lower is model 1.6.
You can see a picture of them here: http://www.audiocircle.com/index.php?action=gallery;sa=album;id=1878#
The 2.0 model is the tallest, the lower is model 1.6.