Well Stereophile reviewers reallyloved the Classe amp. Google Classe Audio CAM 350 review. I believe that this is a really good amp. I haven't heard this one, but I have heard other newer Classe products and I am impressed. On the other hand, the Mark Levinson 23.5 is still to this day one of the best amps out there. Recapped, I would have a really hard time passing on this amp. I have two driving my upper panels and bass drivers via Krell crossover for my Martin Logan Monolith III speakers and the Mark Levinson's are simply wonderful still. When I get the money, I will get two Audio Research REF 250 amps to drive my upper panels and keep the Levinson as the bass driver amp. But, if you can take both the Classe and Mark Levinson home for in-home audition that would be great. If you can't, you really need to hear both driving electronics similar or exactly the same as yours.
enjoy.
enjoy.