I'm currently debating this. I still want it, but it's been a frustrating wait because so far I've "wasted" quite a few Elder Charms trying to roll for it.
Wowhead reports that between http://www.wowhead.com/item=86889 and http://www.wowhead.com/item=86801 (the latter of which I possess and have upgraded 2/2), Taoren is the clear winner. I've already got the Agility Sha-Gem ready for the gun, so I only need the gun itself.
Question is, is it really worth waiting for? I don't feel like spending weeks and weeks of Elder Charms just to get loot I already have and/or don't want.