Pass XA 25 or Bryston 3B3?

They have two different design goals and therefore end up sounding different from each other. If you know what type of sound you want, then it'd be easier to make a choice. Otherwise you'll need to listen to them or at least figure out what your preferences are.

The Adcom is the weak link in the system, results in some unnatural brightness and hardness to the sound. Also less dimensional.

@bobbydd I think both the Bryston 3B3 and Pass XA25 will help with that, with the Pass maybe being too much of a change.

That being said, I agree with the other posters that having only 25W/ch versus 200W/ch is a big difference and would lean me towards the Bryston unless you are absolutely sure 25W/ch is sufficient headroom.