It depends on the fish you want to keep. Those types of filters aren't going to remove much of the mineral content from the water. They are made to catch larger particles that are suspended in water. If your looking at lowering you TDS even further you will need a RO membrane. I would get a TDS meter off of ebay and check the water before the filters and after the filters. I used water that has passed through almost the exact same membranes you have for my shrimp tank. The planted tank get RO water and the reef tank gets RO/DI water.
Do you plan on having a water softener for the house?