It looks like my response did not post the first time so I will try again.
To quickly answer Dmasons question, the combination of the Signature 30 and Quad's is fantastic. While I have only been able to listen to the Quad's with Bryston 9-Bsst and Nuforce 8.02 amps in addition the the Sig 30, I can without a doubt state that the Sig 30 amp is "By Far" the superior amp with the Quad's. Imaging, sound-staging, micro-dynamics, and overall listener fatigue are much improved. For my listening even dynamics seem superior. This is quite amazing considering the Bryston was been bench tested to 141 watts by Bryston themselves. I have to believe that Vinnie's use of the battery power supply has paid off in huge dividends by eliminating so much electrical noise from the playback. At times last night I was constantly amazed at what I will call noiseless sound being produced by my system. By noiseless I mean sound so pure and clean it is almost surreal, it is truly something you have to experience to understand.
To respond to the description of electrostatic speakers not being dynamic, I will agree that as a standalone electrostatic speakers can be lacking especially in the Bass region. However, pair with a really good subwoofer, dynamics are no problem. I have my Quad's incorporated into a home theater set-up that absolutely shakes my house when playing Bass heavy movie soundtracks. Just make sure you have a good pre/pro to integrate the bass.
Also, I have found electrostatic speakers to be very good producers of drum playback, I believe even better than the box speakers I have owned. Again a good sub does help in this area for some of the very low Bass drum material, but with smaller drums like snare drums the electrostatic speakers are so quick I find it very real sounding.