400W radiums. anyone here use em?

[Aquattro]

After browsing http://www.sunlightsupply.com/aquari...ballasts.shtml
I notice the Blue Wave ballasts contain one of three possible ballasts. The come with either an Advance, Magnatek or Venture.
I can't believe that any one of these three is the "correct" ballast. I don't see an option to choose the one you want.
So which one is the right one??