Classe owners: balanced vs. unbalanced?

I have older classe equipment and think it works very well balanced. For a 25 foot run I would almost certainly select balanced--that's really very long to try to run single ended.

I use 2 Classe' CA-201 Amps ( as monoblocks ). I have not expermented with bal/unbal. on these amps but have on others. Definitely, as a rule, go Balanced all the way ( as long as the Components are built on True Balanced Circuitry - some are NOT ). It Reduces the "noise floor" with a Blacker Background, hence, more Musical Detail !

My understanding is that only the very newest Classe' amps have full balanced circuitry, and I believe the CA-200 does not. That said, I used my Classe' DR-25 (250wpc) in balanced mode and liked it better than unbalanced, in part because my preamp at the time was fully balanced, and so the whole system sounded better that way. In your case, I would say the Classe' may not sound significantly better in balanced mode, but would certainly not sound worse. Due to the length of your cable run, I would recommend using the balanced mode.