MF A300cr or A3.2cr for my Monitor Silver 9i

Go with the MF A300. Assuming that you are using a preamp (volume control) and not shaking the windows when you listen, the A300 will not be too much power for the Monitor Audio Silvers. The A300 is a slightly warmer sounding amp than the 3.2, which should complement the Monitor Audio's. See my comments in response to thread #1102012568.

Regards, Rich

I would go with whatever costs more. The golden rule in Audio is if it cost more, it sounds better. If you need extra cash to make it happen, live in a smaller house.