While they're not true electrostats I'm going to have to agree with the Apogee recomendation, and in this country a good used pair is easy to find. And on that same line my next recommendation would be a used pair of larger Maggies.
Through the last few decades I've heard Quad, Martin Logan, Sound Lab, Iminent Technology, Magnepan & Apogee. The Apogee and the Magnepans always just sounded right to me. It seems you're geared toward the Quads Douglas, but you really owe it to yourself to try and listen to the other offerings before making such a big decision.
If buying used through A-gon or whatever site you may just be able to audition the speakers beforehand.
Anyway that's my two cents worth.