I'm not sure if i should upgrade, anyway if i do so i'm looking for a used integrated amp in the $2K to $3K price range with balanced inputs.What exactly is wrong with the Classe or the sound of your system that would get you to think about upgrading? What are you hoping to improve?
If i upgrade it would have to be really worth it otherwise i'd rather keep my CAP-151. I have someone who would like to buy my CAP-151 for $1,6K.
Your statements above indicate uncertainty. Are you sure you just haven't come down with a case of upgraditis because you have a good offer on your current Classe? You have a very good amp and to trade it for either of the ones you mention, is just trying a new flavor. But what will it improve?