if you want a good bow for leveling i recommend you to get Quillshotter from RFD random drop, it's a really good bow for leveling with a really good proc chance and damage (90-100 nature damage), this bow requires level 33 or so can't remember correctly.
If you're not on this level, use any other bow from quests until you got Quillshotter, i dont think there's other bows that makes such a huge difference as this bow does