One Thiel-related thought. That amp is rated for 4 ohm minimum impedance. Your CS2.3 rides around 4 ohms over much of its range, but drops to 3 over a broad area from 100 to 1K Hz, and touches 2 ohms at 400-500 Hz where there is lots of musical content. See the Stereophile review. If I were throwing that load at that amp, I would seek real hard-core knowledge and experience. More to the point, I would default to believing Classé, and not burden that amp with that load.