We run Cibbie Super Oscars on our old rally car. Two spreads and two pencils.
The lights are only half the story, make sure you have no bullshit gauge wiring running to all your lights (factory headlights and the driving lights).
As a general rule of thumb, bigger reflectors will produce better performance for the same wattage.
If you have the budget for HID, they're worth ever penny.
And take the time to set the lights up properly, a lot of people have perfectly adequate but poorly adjusted lights and then complain about their poor performance....don't be one of them.