Pass, Bryston or Accuphase for Magnepans?

I tried the Bryston 4B3 with my 3.7i's.  It was not particularly good.  I had a Pass XA-25.  It was not able to adequately drive the Maggies and did not sound good with them. I acquired a Gryphon Diablo 120 which did an excellent job.  But, my AGD Audions do the best of any of these by a considerable margin.   I would expect that a Pass 250.8 would do a great job, but I have not heard it. You will probably need to audition for yourself. 

”I tried the Bryston 4B3 with my 3.7i's. It was not particularly good.”
What was it you didn’t like about the Bryston?
A friend of mine tried both the Diablo 300 and Progression int and preferred the Dag.

Why not ask the speaker manufacturer? I bet they demo them with certain amplifiers when they are designed and voiced. 
 

Currently using the Pass 250.8 with 3.7i it has a great sound and plenty of power, slam and dynamics. I think this combo won TAS best at show a few years ago.
I did plenty of research and didn't find anything but positive for the Pass and Maggie combo.