Thanks for the suggestion Jack, but from some pics I've seen by googling, it looks like this will take up more than 2 PCI slots even using it as a passive heatsink. This GTX 260 will eventually be used as a Physx card, and will be put in the PCI-E slot at the bottom of my motherboard. The bad thing about that is the card might not fit at the bottom if it's more than 2 slots high.
If I get a great deal on a better case, though, I will certainly consider this because at that point, how big it is won't matter.