Hamilton cebu sun ballast upgrade?

[tray]

I'm looking into getting a 24 inch 250 watt fixture but I was curious as to if I would be able to upgrade the ballast to a electronically or digitally controlled ballast. It comes with an m58.
Are there any other ballast recommendations besides the m80?

Or

What would be another good fixture/ballast for a stand alone or retrofit kit?

It will be going over a 93 cube.

 

[Reefing Madness]

H37 Ballast
But isn't an M80 a double eneded lamp ballast, and an m58 a single?
You just need to watch which ballast your getting for which lamp your using. Pulse or Probe.
http://reefkeeping.com/issues/2007-03/sj/index.php

 

[tray]

The m80 is what everyone uses to run radiums I believe. I could be wrong as this is my first venture into halides. Just from a quick Google search it looks like the m58 and h37 are comparable. Which bulb would you suggest?