Hi Phil,
I recently had my CAT JL-2 fully upgraded by Ken Stevens along with adding High Fidelity CT-1E ic's to my Avalon Eidelon Diamond based system. I have many times considered other speakers, but the Diamonds continue to play what they are fed. Presently, with the changes I have made, it proves to be speculative at best to search for a more revealing and honest speaker. They just do as told. The modified CAT amp, consequently, is an undeniable powerhouse driving the Diamonds producing a most enjoyable musical experience.