The KitchenAid Superba EQ KUDE48FXSS is by far the best dishwasher we have in the market at the moment. It is energy-efficient, and also operates at a low sound level. However, the racks as well as part of the electronics are not under warranty for the first year.
They are all made OVERSEAS, so it's a toss up. I've heard good and bad things about Kitchenaid, as well as Bosch, and Maytag!! You need to check out, the features of all of them, and prices, and see what's best for you. Whichever one you choose, be sure they have the nylon racks!!!