Interesting question because it puts two legitimate concepts in opposition. One is the view that the less you mess with the signal, the better the sound. Therefore, simple, well-designed amps are “best.” And those are going to tend to be low power. You could argue that means high-sensitivity speakers must follow, so you’ve got the perfect pairing. Except speaker sound is totally subjective (“it’s all in your head!”), and the variations in speakers are vast compared to electronics. After decades of close listening, what if you learn you prefer a low-sensitivity speaker, like Magnepan in my case? Then I say you find the electronics to drive it and just enjoy it.