Hello HBrandt:
I currently use the ESL amp for my CLSIIZ's, and can't imagine a better amp for them; it is such a great synergy. The ESL amp gets all of the smallest details, and is capable of greater dynamics than I've ever heard with CLS speakers. It never sounds the least bit strained or hard, even with very dynamic peaks, and is purpose-built for 'stats. I have also used the ESL amp with the Innersound Eros, and various models of Acoustats, and it was also better than any other amp I have ever used with these. Furthermore, I paired it with current-hungry Apogee Duetta Signatures and Gallo Nucleus Reference speakers, with very impressive results. I give this amp 5 stars (at least), and it could find a home in many systems. The support from Roger Sanders for his products is without equal in my experience, and he has been very generous with tech support and information. Good Luck