We talk, but are we communicating; some people have equipment to hear music, while others have music to hear equipment. Which camp do you fall in?
If one is an obsessive music lover SS preamps never sound quite right, however, obsessive equipment lovers claim tubes give distortion.
I think tubes versus SS is more profound than Class A, AB. Personally, I would not want SS preamp no matter what class or how expensive, SS power amps are OK when necessary. Could not stand ARC preamps that were SS, I don't know if they still make any SS preamps?
While theoretically class A is better, given same quality of parts and craftsmanship, I'm sure there are few people who could pass a blindfold test to distinguish which was which.