Skarner: Max E or Q first?

I'm having a tough time with this one. Here are the stats:

Q - 33 / 36 / 39 / 42 / 45% AD + 33 / 36 / 39 / 42 / 45% AD + 20% AP if empowered 9+1 per point in the skill mana cost per cast 3.5 / 3.25 / 3 / 2.75 / 2.5 cooldown - reduced if hitting champions by 1 second or minions by .25 seconds

E - 40 / 75 / 110 / 145 / 180 (+ 40% AP) magic damage + 25 / 50 / 75 / 100 / 125 physical damage if you proc the mark. 45 / 50 / 55 / 60 / 65% slow 13 / 12.5 / 12 / 11.5 / 11 cooldown - reduced by 1 if Skarner stuns a foe and 1.75 if he uses impale.

I have only listed the scaling stats to do a direct comparison. In my own opinion, as a juggernaut, Skarner probably wants to max E first because it sets up ganks a little bit better with a better slow and has a shorter cooldown. The only benefit of leveling up Q is an increased damage output now that the attack speed and movement speed steroid have been removed. Does the scaling % total AD on Q benefit him more to level first (you have to keep in mind that this is a double ratio with empowered Q (essentially 66% empowered AD rank 1 vs 90% empowered AD rank 5) and the fact that you basically spam this ability when auto-attacking champions at level 5. That is a lot of damage to put out.

The trade off I guess would be if you need more damage early game or more peel and initiate early game.

Thoughts?

Edit: On a side note, I would never max W first because you only gain 1% additional of your total health as a shield per rank and the cooldown only decreases by 0.5 seconds per rank. The final movement bonus only increases by 4% per rank as well.