Per Joe Hagman from Home Theater Magazine, B&K is great with Monitor Audio. You should try to get a good fit with the center since it's the most important. I think the ST-125.3 and the reference 200.3 are their current 3 channel amps. If you are trying to shop for an amp based on a recommended pdwer rating don't. The manufacturer uses the number to protect themselves in case they are blown up by a huge amp, so it's pretty arbitrary. In addition, most manufactures tend to underate their amps, that arcam is probably more like 120/130watts. I'm sure your speakers could handle 200-300 watts with ease.
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