Go whichever spec you want....for lvling I also recommend Enh and if you cant find any lvling guide you may do what i do: just do it in pvp spec (especially when you are on pvp server). I did like that on all my characters and never regret it. The only difference between elemental and enh shaman pve is that, enh shamman is easier to gear and does dmg and dps with some "starting" items. The elemental shaman does dps as well but one must be well geared to have all caps and good statisticks. We have in guild ele ashaman and she does 35+k DPS.
And one more thing...you are shaman...you will not have as much problems with getting party as others cause ppl prefer to inv players with BL no matter which spec you have...
Dont want to be an d**k but the person asked simple question which talent tree is best for PvE at 4.3.4 patch for shammies he didnt wanted any other info which is good for leveling or ect
and yeah, epitaph44, how do you remove rogue stuns without trinket ? since .. it's a stun effect which makes you a loose control of you character fully .. it's not a movement impairing effect which could be remove by spirit walk....