Rleff --
Many compare electrostatic speakers with good horn dittos (the latter with better dynamics, certainly macro-wise), and though I've yet to audition them I'd recommend you look into the Oswalds Mill Audio Mini's:
http://oswaldsmillaudio.com/miniThey're healthily priced I must add (~$20k pair), and a sub is necessary if one is to expect sub-like information with true weight, but they are very interesting nonetheless.
My reason for recommending them is also that they share some similar traits, perhaps more or less vaguely so, to my own speakers, which have often been compared to panel-speakers of some sort.
First and foremost though Mr. Weiss' endeavor with OMA is highly intriguing in how it breaks with the more established hifi-approach - unfortunately more exclusively for the ones to savor with their pockets filled...