I'm currently using a pair of 100W class A amps from the 90s (Sony TA-NR10) and thinking of trying out some more modern designs. My speakers are Sony SS-AR1s.

Locally there's a pair of used Constellation Mono 1.0s and a 1st Gen Centaur Stereo available for the same price. Home audition won't be possible so curious if anyone here has experience with both and can offer any insights on which might be the better choice.

Reading reviews online it sounds like the Centaur will win in refinement but the Inspiration in bass performance. I guess the question is really then just how much bass quality you give up for the refinement. I will not be using a Constellation pre.