I just acquired a pair of CS2.4SE. They are incredible, especially at this price point - all the more so used! IMO, close to SOTA resolution, transparency, and neutrality, give up just the last half-octave of bass. I think I would need to spend north of $30-40K to get a significant improvement in SQ.
And of course I admire your system. I'm driving my Thiels with an Ayre AX-5 Twenty and the pairing is nothing if not magical! I think the Ayre is a big reason the Thiels are singing at such a lofty level. The only upgrade I fantasize about now is replacing my QB-9 with a QX-5, but I already broke my budget with the AX-5. Maybe if the QX-8 is released . . .
If you ever get the upgrade bug for speakers, I recommend you first replace the capacitors in the CS2.4s. That is supposed to be the only sonic improvement of the SE version.
