My first reaction would be to recommend a pair of Original Quads, perhaps rebuilt by the Electrostatic Doctor with lighter panels and separate power supplies for the bass and treble sections. Given the "small footprint" criterion, though, hybrids come to mind.
You might consider the InnerSound Eros with InnerSound's amp driving the bass, and the Jadis on the panels (assuming Roger Sanders gives it a thumbs-up). If you want the Jadis to drive the whole shebang, then I suggest the Sound Lab Dynastats, which (unlike the full range Sound Labs) are fairly efficient (about 88 dB) and a rather easy load to drive, especially for an electrostat. I have a fair amount of experience with the Dynastats, having owned them and being a dealer, so I could help you out with set-up tips and a few tweaks. I don't think the little Jadis is beefy enough for the Quad 63/988/989 type.
I'm afraid your lovely little Jadis doesn't offer you a whole lot of options when it comes to driving electrostats. Nor would it work well driving a full-range ribbon or planar magnetic speaker.
How about the Kithara, from Heil? It uses a modern incarnation of the famous Heil driver from 700 Hz up and has a reasonably small footprint. It's a 4 ohm load, but it's 94 dB efficient, so your Jadis ought to drive it quite well. The bass is a little on the fat side (or so it seemed in the room I heard it in), and it does like plenty of breathing room around it. But at four grand retail, it has few rivals. In fact, it has few rivals even at twice the price. Nope, I don't sell 'em.
Just my $.02.
