GE's
Actually, GE's aren't bad on water, except the standard tub models.
Our GE Triton XL uses a mere 1.2 gallons per fill. Yet is able to wash with a pretty powerful pump.
My apartment's Frigidaire uses 1.2 gallons per fill, yet it just pisses over the dishes with no pressure. how GE did it is amazing, and great. Water savings along with clean dishes. Nice.