Look into Bosch. Replaced our KitchenAid after many years,have had this one for at least 10 yrs.
It's quiet for a dishwasher but the wash cycle takes a while.
Over 10 years ago a Whirlpool quiet partner 1.
It still works but scored a FREE Bosch on craigslist and it was used and also works very well.
Stupid quiet. sit in the next room and never hear it.
BUT the insides are 2" smaller everywhere due to the multi layer insulated housing I bet.
I insulated the door and more around the sides of the Quiet partner 1 and made it very quiet.
And they both clean very dirty dished but the Bosch with it's long clean cycle will get 400F baked on potato and milk off glass cooking dish.
Whirlpool would have some resin left on the dish.