Some really picky Survival hunters may want to pick up Terokk's Quill over Sonic Spear if they're trying to stuff their gear with agility. The more agility they have, the more effective their Expose Weakness becomes. Giving up that AP difference for the agility in a raid environment results in other people in the raid doing more damage, which overall means that the entire raid is doing more damage than if the hunter had grabbed the AP.
Personally, when I specced Survival for a while, I prefered SS and slapping on a +35 agil enchant, but that's just me.
Personally, when I specced Survival for a while, I prefered SS and slapping on a +35 agil enchant, but that's just me.