Fully loaded, the 800 Plus Dishwasher operates at 39 dBA, making it the quietest dishwasher currently available in North America, according to Bosch. It’s also the most energy-efficient, says the company; it uses barely 2 gallons of water per cycle and consumes 97 percent less energy than federal standards allow. A half-load option further reduces energy and water consumption when washing small loads. Costs range from $1,400 to $2,000. BSH Home Appliances Corp., 800/944-2904, bosch-home.com.