In response to WhirlorBosch's post from November 06 2009 03:51PM
The Bosch is going to be quieter than the Whirlpool, because the WP has a hard food grinder, while the Bosch uses a triple filtration system.
Cleaning ability will be comparable. However, be careful with the amount of detergent you use in the Bosch, as they don't cotton much to excessive or short-shrift dosing. The pre-measured packets are not a good choice for Bosch machines. You're better off with a good quality powder or liquid, like Finish (formerly Electrasol) or Cascade.
Ease of use? Well, that depends. Bosch has improved their drying system by incorporating ventilation inside the dishwasher (previously the drying system required the door to be opened to finish). This will increase the ease of use. They've also moved their silverware rack to the right of the bottom rack, rather than the center, which gives them a more conventional, and convenient, configuration. Their racks are also a little more spacious, but Whirlpool will still win out on capacity. The door-mounted silverware rack doesn't hinder cleaning of utensils that don't extend up to the top rack. For anything excessively long, lay it flat on the top rack.
You also may want to consider the Kenmore 13892, which is the Kenmore version of the Whirlpool model (silverware rack on the bottom rack, rather than the door), and Maytag MDB6769AWW (02219962000 on sears.com) which is the Maytag version of the Whirlpool model. The Kenmore and Maytag models have towelbar handles.
Oh, and if you want a stainless steel tub, consider the Maytag MDB7709AWW (02211862000 on sears.com). Maytag has been aggressively pricing its stainless steel tubs. Keep in mind that this model has the traditional control panel. If you want integrated, you can look at the Maytag MDB8859AW (02211872000 on sears.com), which does slightly exceed the $600 mark, but has the integrated controls with a towelbar handle.