If you have the room, why not find a good, used top loader to put next to yours? If you could reuse the wash water even once, you could wash 2 loads with half the heated water used by your top loader and have faster cycling time than with a new front loader. You just add half as much detergent for the second load to keep the soil suspended. Generations grew up doing that with wringer washers and later, sudssaver washers and, ulike with a sudssaver washer, the water won't have to sit and cool while the first load finishes the rinsing and spinning. You will still get great washing and probably better rinsing than with most front loaders. Water extraction would be the only way the top loaders would fall short. It will take some planning to have two loads to wash together. If you use bleach in the wash, it would have to be two loads of whites and you would have to be near the machine to switch the drain hose back to the stand pipe or tub after the wash drain, but you are wanting to save money. A set of Y connectors for your faucets would be all you would need. As you said, your WP top loader is doing fine and if space is not an issue, you could save water on the cheap without the issues so many have with new front loaders. PLUS, you would always have a spare!
