The lifters (spacers) help keep the tank cooler, but not the bulbs and ballast. The Corallife CF I have has two fans. One blows air into one side of the fixture and the other pulls it out the other side virtually eliminating heat build-up around the ballast and lights.
Anyway, I was just pointing out why the pricing was different for different CF fixtures. They aren't all the same and you get what you pay for. With the fans you MIGHT save in the long run on bulbs (not cheap) and ballasts.
That being said, you could easily add a fan or two to the less expensive CF's. I know you are familiar with that Kyle
And also, as Kyle pointed out before, CF's for the most part are not really necessary. This one on the tank is the only one I'm going to have, all the rest will be regular flourescent. I too have a bottom sewn into my pocket.....

sniff