I've mostly used special grade for the last decade. Prior to that I used finer but didn't have tons of flow. I went back to finer a couple years ago and its been nothing but headache. It looks nice but pretty much ANYTHING causes a sand storm. And I'm not talking about the pumps themselves. You can have the pumps perfect so they just rustle the top of the sand but as soon as a fish tail swipes the sand, bam, you've got find sand blowing all over.
I just removed half the fine sand in my tank and replaced with special grade. After a few months I'm removing the other half and adding back special grade.