Help with lighting

[sicko]

I am looking for a 400 watt HID ballast. I need help choosing between a few ballasts. Which 1 is the better, complete, package? Already got a 400 watt MH bulb that I got for free.

400 Watt Metal Halide Ballast

1000 Watt Metal Halide Ballast

400 Watt HPS Ballast