Ok, I messed up pretty bad picked the wrong faction for my character. Is there anyway that I can reverse this and switch to the other one. I want to be Scryer but I'm Aldor right now.

Ok, I'm only a level 46 priest so I know it's a little early to start worrying about whether to pick Aldor or Scryer but I like planning out my character. At 70 I plan to be holy specced for healing and doing a lot of instances. Which faction, Aldor or Scryer is best for a holy priest? Oh, I'm a draenei btw.