Von Schweikerts. The literature claims they excell any planar/electrostat in terms of transparency, and they do just that, dissapearing in a room like none other I've ever heard, and most models go down to at least 20-25hz. There are not many VSA dealers around but if you have one locally give them a listen, you will be impressed.
Box speakers that sound like Electrostats?
Has anyone found a monitor or full range speaker that compares to an electrostat?