I think the Sim Audio and Classe amps are more refined than the Bryston amps but I wouldn't call them warmer. If anything they are slightly colder sounding and more clinical. The Classe CAM350s are more refined amps than the Brystons but they're also more money and with Classe amps you never really feel like you have a powerful amp. They just don't have the low end weight that the Brystons do.
If I was strictly choosing amps based on sonic qualities then yes I would probably choose Sim and Classe over Bryston mainly cause I don't need that power and I prefer more refineness but there is a definite synergy between the PMC speakers and Bryston amps. I auditioned a pair of 7Bs SSTs with PMC MB2s and the sound was unrestrained and had a natural tonality to it. PMC and Bryston are just a natural match. Plus it's also a combination that you can easily audition.
If I was strictly choosing amps based on sonic qualities then yes I would probably choose Sim and Classe over Bryston mainly cause I don't need that power and I prefer more refineness but there is a definite synergy between the PMC speakers and Bryston amps. I auditioned a pair of 7Bs SSTs with PMC MB2s and the sound was unrestrained and had a natural tonality to it. PMC and Bryston are just a natural match. Plus it's also a combination that you can easily audition.