Integrated amp upgrade


I'm using a Classé Audio CAP-151 to drive my Thiel CS 3.7s at the moment.
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.
I've seen a Sugden IA4 for $3K and a Musical Fidelity KW 550 for $2,4K but it's not balanced.
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.

thieliste
Do you plan on listen to the amp first, or are you going to take a chance and hope for the best? Also, you should list your entire system because it makes it a lot easier to recommend something you'll be happy with.
Well it's not going to be possible to audition gear on the used market.
My source is a Hegel HD12 streaming music from Qobuz via USB.
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.

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.
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?

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?