Perhaps change to some Vintage Speakers that are a bit more efficient, that would keep the power needs lower so you can continue to use Yamaha for power.
It seems you like Yamaha, I only ever had 1 Yamaha piece, my CR-1040 Receiver, 80wpc, it sure is a winner, it replaced my Tandberg 2080. I use it for my Garage/Shop system, driving two pairs of speakers.
They made a CR-2040, 120 wpc, it’s a beauty IMO, and the rarer CR-3020.
I restored two pairs of 3 way AR-2ax Speakers, the 1st sounded so good, I use them in my office system, then I did a second pair to use with the Yamaha Receiver.
AR-2ax Refurb
I never heard them except in a store, but the AR-3 was highly respected.
I have to believe you would like the sound of 90db 1w/1m AR-2ax or AR-3, either is easier to drive than your Advent Large 2 way 86db
In the photo is the Chase RLC-1, I use it via the Yamaha’s adapter loop to get remote volume and remote mute for Vintage equipment with no remote features.