How does my MF A308 compare to modern integrated amps in the $3000-$6000 range?

If you do start wandering, I'd try to start sampling totally different typologies (e.g., a full tube integrated, a class d integrated, an otl) rather than just sticking with other class a/b amps. You'll learn more that way.

And as always, amp to speaker matching is an essential and hard to fully predict challenge.

op did not disclose, but with his good amp, if he is trying to improve overall sq, he should look at source or speakers (assuming room setup is done properly) for areas of substantial improvement for more $ spent... that is where there will likely be more leverage

Just my 2cents worth.

I went from a Musical Fidelity A5 integrated (which I absolutely loved for years and years), to a Luxman L-509X - and it was a definite upgrade.

I got the Luxman used for just over $6K and thought it was worth the coin.

Improved sonic textures and tonality, more features and those meters! :-)

Thanks, everyone. Erik: what speakers do you have? I feel that my MF is a good match with my ATC’s. Obviously, there is a synergy here, let alone all the other factors that others have mentioned. I’m sure it’s true that I need a better DAC, and other elements in my system also need upgrading. My question is more a curiosity thing than the next thing I need to do to upgrade. Following the rest, it’s something I might or might not face.  And it is  nice to get validation that I have something worth hanging onto.

I also have ATCs; SCM11v2s.

I also really liked the MF/ATC matchup, but the Luxman is even better.

But only you can decide if you want to try something different.

I like to buy used (here or other sites). That way I can try gear for myself and flip it back at little/no loss if I don't like it.