Can't help you with the Brystons (which I've heard sound great on other systems) or Sims, but I've been using the CAM-350's with Egglestonwork Andras, which require a great deal of power, and the 350's sound wonderful. I think the recent Stereophile review of the 350's used them with Maggies, and he raved about how they drove those speakers.
Classe Cam 350, Bryston 7bs or Sim W5
I'm looking for amps for my Magnepan MG 3.6rs. I'm considering these three amps. I need your opinions and experiences.