You can buy HOD globes that are 55/65w H4 and are as bright as HID but at a fraction of the cost.

Edite: The HOD globes operate @ 6000k like HID but are not as efficient as HID in light output. ( for those who don't know what the "k" means, it is the unit used to measure the temperature that the filament inside the globe ignites the gas. "K" is short for Kelvin)