Other than some really extreme designs and extreme applications (very large room, ear-bleed level requirement), a 75 watt amp should work with almost any speaker. I've heard notoriously hard to drive Magnepan 3.6 driven quite adequately with less than that amount of power. I've only heard the MBL speakers attached to much larger amps, but, I bet they would be more than listenable with smaller amps.
I don't think you are seriously constrained in your choice of speaker with that much power on tap. Like anything else, there will be synergy issues concerning specific combinations of gear, and that, more than power per se, will be important.
I don't think you are seriously constrained in your choice of speaker with that much power on tap. Like anything else, there will be synergy issues concerning specific combinations of gear, and that, more than power per se, will be important.