How to select cartridge output to match phono amp

I have a Musical Fidelity XLPS phono stage that has sensitivity specified as 350micrvolts and input impedance specified as 100 ohms.

From this I am not sure what level of output I need from an MC cartridge in order to work well with this pre-amp.

Would the Sumiko Blackbird with 2.5mV be sufficient? What about the recommended 47k Ohm loading for the blackbird? What will happen when connected to the XLPS with lower impedance?

Thanks for your help
John T. Riordan