My wife and I purchased a Bosch and could not be happier. It's the quietest dishwasher I've ever had. If you do notice it, it sound very low and muffled, like very distant traffic. We always set the timer so it washes during the night. I've never heard it.

My father had a similar problem with the drain on his dishwasher. With just the two of them at home, they rarely used it. The repair person found because he rarely used it, food had hardened in the drain and stopped the impeller of the pump. You may be able to clear the obstruction yourself with one of those flexible spring-type drain cleaners they use for coffee makers. If this is the cause, it may be worth the effort to avoid future repairs as well.