Understanding speaker power rating vs sensitivity

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Around 85dB, but when there is a party I need it to work at >90. Sometimes I also like to crank it up a bit for a song, but keep it short.

This whole ordeal is I want the system to be able to handle reference volume. Not that I always play at that level. It now does that just fine but had no chance whatsoever before the power amp.

It all makes sense since you provided most if not all of the information specific to your use case. I think some of us are concerned that if you do listen to reference, or even close to that for sustained period of time, you really need to consider the possibility of hear loss, whatever's lost (unlike eyesight), you won't get it back. For short time duration occasionally it's supposedly fine, though I still wouldn't risk it. Is 75-80 dB not acceptable for such occasional party levels?