I don't wanna have to put all the caveats. This guy knows his stuff for car audio. I don't wanna say "given a reputable brand and ensuring the speakers are designed for home theater and they're designed for X and that when I say 'more expensive', I mean from a given manufacturer's lineup", etc etc. And the speaker sensitivity changes how loud you can play at any given power rating provided that's measured correctly, etc.
Overall, if I buy Polks and get a higher end model that costs more, it will be a better speaker. If I buy Perlisten and buy the highest model, it will be a better speaker. If I buy a JTR and buy a higher model, it will play louder or lower. In my experience, it's rare that any home theater speaker company would break this pattern. The 2-channel world is the wild west, but the home theater world, given a set of respected brands, is gonna be "more money = better".
Doesn't mean your system would benefit, but that's not what I'm saying. That has nothing to do with setting the crossover to 120Hz or 90Hz.