Speaker Impedance

If a set of speakers have these measurements:

Impedance: "reaches a minimum of 5.21 ohms at 356 Hz and a phase angle of -36.19 degrees at 179hz."

Sensitivity: 91db from 500Hz to 2kHz

Any thoughts on what an amps minimum power should be?

Would these speakers mate well in terms of power with most med and high power amps?

Thanks for the feedback
A lot will depend on your room and your listening habits, but in an average room 60 watts will be a good minimum power. Any tube amplifier or solid state should be able to handle that load.