Morning millercarbons.
Setting the bar at 90dB is cutting out 80-90% of speakers made, including an awful lot of good ones. Per hundreds of tests I have read, manufacturers ALWAYS overstate sensitivity, by up to 5dB. I have NEVER seen a test come out at more than the maker's spec!
Watts are cheap in these solid state days and there are plenty of amps that put out 400+dB.
So, don't limit your choice and don't believe manufacturers' specs.