There is a lot less brand variation between electric WH verses their gas fired relatives. Keep in mind that the extra warranty often only buys you an insurance policy, the tank itself may be identical to a 'lesser' version. IF it were a gas unit, people here like Bradford White and Rheem units (Rheem makes the GE ones for HD), but from what I hear, there's not a lot of differences on electric. The details on the warranty may bare some scrutiny as well. Not all are created equal!