Panasonic makes some very nice, very quiet fans.

For anything other than a powder room, I would use Panasonic. I would want a noisier fan for the powder room. Make sure the duct actually exhausts to the outside!

I believe the reason was "so no one can hear you".

Powder rooms are sometimes located near public rooms in the house so white noise makes the user more comfortable. Mine is right next to tv room but we opted for in line (no noise) like all our baths but added sound insulation so at least you don’t have an audience. Presuming you have access from above replacing a fan is straightforward. As noted above the most important thing is that it is actually vented outside not into the attic.

lol