I had the same problem with wife not liking any noise that the tank would make.
I finally upgraded my tank to a 90 acrylic with sump, chiller, UVS, and put everything under the cabinet. I also cut two angled slits in the top of my overflow pipe. That help cut down the common gurgling sounds.
Wife likes the tank but still once in a while will state that the tank sounds different at times and she does not like the noise.
She love anemones so that gave me an idea.
I got a large Rose BTA for my wife.
Best trade I ever made!
Good Luck