Many of the new highest capacity and most energy efficient washers have impellers in the bottom of the wash tub that perform the wash action and clean the clothes. These washers look enormous because they have no obstructions in the tub, but they have to be loaded properly to avoid tangling and to allow the clothes to be cleaned properly.
If you are not sold on the performance of these new designs, GE and Maytag still make agitator models that are very energy efficient and have big tub capacities. These are just a few of the factors to consider when researching a new washing machine (check out our washing machine buying guide for more info). Most of the new washing machines are very different in design with direct drive motors and load sensors to control water usage, but GE and Maytag have packed most of this new technology into these models while sticking with the traditional agitator design that some people prefer.