I don't think it'd be a waste, but what did you want to be able to keep? It would probably allow you to keep lower- mid light SPS in the top half of the tank. Depending on the money have to spend, you might want to look into a T5 or MH fixture to keep the more demanding SPS corals. A 4-6 bulb tek or nova pro T5 fixture would allow to keep pretty much anything you want.