PMC speakers are a natural match for Bryston amps. They are generally very dynamic across their line with a good price/low-end extension ratio.
I heard the IB1s and MB2s quite a few times with both McIntosh and Bryston amplification. The IB1s were too punchy for my tastes. The MB2 gave a much more relaxed sound. I felt the MB2 was pretty musical rather than a strict studio monitor type sound. But if you're buying the monitors, factor in the cost of the stands. They're very pricey and IMO not a good value.
I heard the IB1s and MB2s quite a few times with both McIntosh and Bryston amplification. The IB1s were too punchy for my tastes. The MB2 gave a much more relaxed sound. I felt the MB2 was pretty musical rather than a strict studio monitor type sound. But if you're buying the monitors, factor in the cost of the stands. They're very pricey and IMO not a good value.