Impossible to answer that one definitively but if it helps, I use a 10w amp to drive 90dB speakers in a large room, sitting 10 feet away and I have never heard my amps clip. I don't listen at ear splitting levels but cranking it up my ears run out of head room before the amps do.
No doubt that removing bass below 100Hz will help your amps, but a 5 to 8W amp may surprise you with those speakers, even without the subs.
No doubt that removing bass below 100Hz will help your amps, but a 5 to 8W amp may surprise you with those speakers, even without the subs.