I second Bosch. We had one installed last year and it's been great. Super quiet plus I love the cutlery rack at the top. The cutlery rack is really helpful for small items like sippy cup lids or small water bottle parts.
This dishwasher has exceeded my expectations, and it's really unique and convenient for work and travel: Portable Countertop Dishwashers, NOVETE (available on Amazon)
I asked this question last year and got quite a few responses. I ended up with the Bosch SuperSilence and I am happy with it. It IS very quiet. I originally thought the controls were kind of finicky but now that I'm used to them they don't bother me. freshchalk.com/a/best-dishw...
I'm a couple days late but I'll throw in a recommendation for Miele, as quiet as Bosch and in my experience (and according to Consumer Reports) they need fewer repairs / have a longer lifespan than other brands.