I’ve heard the Pass X250.8 in my system. It was a lovely, liquid sound, slightly midrange-forward to my ears and easy to listen to in the treble. I would have kept it, but I couldn’t tolerate (in a basement room) the 400W of heat it puts out at ldle. If anything, the X350.8 should sound even better, and run even hotter.
For years, I used a Bryston 14B SST, and I thought it was the best amp I’d had. I still miss it. Reviews of the 28B say it’s in an even higher class in the treble especially, and the bump from SST to SST2 is supposed to add a little more to that. Comments about a 4BST, though certainly offered in good faith, won’t reflect the sound of a 28B SST2.
So, I think you have named two great choices, and the only way to know which one is right for you is auditioning in your own system and room.
For years, I used a Bryston 14B SST, and I thought it was the best amp I’d had. I still miss it. Reviews of the 28B say it’s in an even higher class in the treble especially, and the bump from SST to SST2 is supposed to add a little more to that. Comments about a 4BST, though certainly offered in good faith, won’t reflect the sound of a 28B SST2.
So, I think you have named two great choices, and the only way to know which one is right for you is auditioning in your own system and room.