Greg,
I'm not sure what exactly the relation is between BSH (Bosch und Siemens Hausgeräte GmbH), it's not listed as one of their companies like Gaggenau, Neff and Thermador. Küppersbusch (they lost the 'umlaut' somewhere in that big pond I guess) is a company that started with the production of stoves in 1875. They are big in heating technology and institutional kitchens. In the domestic appliances business they are well known in Germany and I think they have a good name. But I haven't seen a Küppersbusch appliance in years, overhere in the Netherlands you hardly see them.
Küppersbusch, according to their German website invented both the glass ceramic griddle and the ceramic induction wok cooktop. I don't know if the dishwasher is made in Germany or in the US, it seems logic that it would be made in the US and then $1550.- is a steep price for a dishwasher, especially because the Bosch dishwashers are cheaper. And you don't even see the control panel!
Louis