Frank,
As you probably remember, I'm an electrostat lover, but I can honestly say the Raidho speakers are the most 'electrostat-like' box speakers I ever heard. Avalons and Peak Consult are very close. All three are VERY expensive -- and also the sonics of all three are superior to Wilsons and Kharmas IMO.
I first heard the Raidho at CES where Jim Aud (of Purist Audio Design) was using them to demo his cable products (I walked into his room thinking the speakers were what was being demo'd ;~) and I've so far had no reason to change my mind . .
I did wind up buying some cables from Jim ;~) But if you can afford the Raidhos, you will keep them for a lifetime.