Ballast choices - what would you do?

[Whatigot]

oh cool.
I would love to see that substantiated....

I'm looking for some 250 ballasts and it seems like the ice caps have the best performance with my bulb of choice, the phoenix.

and wasn't it the icecaps that made the175 watt iwasaki par buster?
http://www.advancedaquarist.com/2005/12/review#h12

Seems whenever I do dd into ballasts, icecap consistently comes up as a solid performer...