Hearthpwn

I only have enough dust for one. 

Yeah, that's the main reason I'm scared of crafting aggro shaman. It seems like a very delicate deck whose power heavily depends on the current meta. On the other hand, it seems like more fun to play than druid. 

Both strong but I would say mid range Druid is more reliable at high ranks.

shaman is really good right now too but honestly it seems like a crap shoot. I have no problem playing against it with... Secret paladin ;)

I'm currently climbing primarily with those two decks, at rank 4 now. Go for Druid, I'm having a lot of success with it right now and it's extremely difficult to hate it out so I'd expect it to stick around. 

Agro shaman is much more meta dependent than druid. I know everyone has already said that, but just to reinforce the point.  

I recommend midrange druid hands down.

Mid Range Druid since its more flexible, face shaman is too meta dependent.

I'm crafting druid. Thanks for the advice guys