Your amp power is a non-issue, just keep the volume in check.
This is true.
I am using a Lowdown Studio 110 combo modified with a switch to isolate the 8 ohm OEM speaker from the built-in head, to use with either my Eden WTX260 (170W @ 8hm) or Markbass LMK (300W @ 8ohm).
I brought the combo to the shop to try out the MB LMK, and the sound was good! The full power of the amp is really pushing every inch of the speaker! But hey, gotto keep the volume in check as mentioned by will33.
Someday I may change the OEM speaker to one that is of 8ohm 200W spec. Any recommendation? Eminence? Celestion?