Level 70-80 Spec?

[Gravesong]

Hey just hit level 70 on my lock while leveling affliction it worked pretty good.
I sort've want to do another *new* spec, but I'm not willing to if it means leveling slower.
I've heard Destro is good, but I've heard affliction makes it faster because of less downtime.

So what's a good spec I should go for leveling?

[Willferel]

Really it doesn't matter. Do what spec you want to try, switch again if you want to try all 3.