Hmm, W10's are 50% more expensive than the Brystons. I think both are fine amps. However, the Brystons may offer a greater level of synergy with the PMC speakers (which I really want to hear, I have no local dealers). Ultimately Sim and Bryston have different tonal characteristics with neither being a clear winner.
I would bet a ten dollar bill to a donut, that the PMC's are voiced with Bryston amps.
I would not recommend Classe over Bryston unless its the monos (CAM-350's or Omega's), especially considering the speakers.
Anyway back on point. Both are great amps and I dont think you would be terribly disappointed either way.