Asko aren't bad either, I find their diskwashers are better than bosch, having owned both. Miele if you want top of the range and something that will last and last.
I've had two Asko dishwashers actually, one sounded like a freight train and faulted and the 2nd one was just stupidly loud.
The quoted 'super quiet' running volumes are apparently quoted when the machine was tested inside some super sound absorbing cabinetry. As it turns out, my Sweedish made units were the loudest dishwashers I've ever had. The stainless interior was a beautiful piece of engineering, but the spinner snapped off...
Repairs were expensive, but the dishes were always well cleaned.
The entry level Miele dishwashers were okay, but down on features with pretty rudimentary runners on the bottom tray that fail easily (but are childs play to replace). My whiteware is all Miele though, that's some seriously nice kit!
Bosch seem to get most things right at a good price though IMHO.