A lot of people use 3*250 MH with some atinics (VHO) for a tank that size, but people who want to run higher K bulbs (20K) sometimes use 400's. T5 is also an option but I know nothing about those lights.
I would go tunezes if I had the cash, I really like them, low power draw, tuns of flow.
Do you plan to have sand? that could effect your flow choices.
Whiskey