When I mentioned about "comparison", it was more in the sense of - Watts being equal, how does the ZOTL technology compare with JFET technology? IS the sound more sweet, open, etc. Of course the A21 is more powerful. But the Tekton is fairly efficient and if you match the MicroZotl with Parasound how does the sound compare?
BTW, in your system (at least the pics), the Tektons do not look overbearing as they do in some systems, which is a good thing.