It depends on what you plan on keeping. If you plan on starting out with easy corals like mushrooms, leathers, bubbles and star coral types then you could go with 2 6ft VHO bulbs and then if you ever decide to go with hard corals or higher light corals then you could get the MH and use your VHO's for actinics. No use in spending 600.00 minimum for decent MH if you don't have to.