Shaman or Priest

[justbeisme]

I'm looking to choose a class for MOP, and I like both the Shaman and Priest classes equally. However, I'm pretty lost on how well shaman is vs. priest in dps and healing. Does anyone have any first hand experience in beta or any info than can relay from their experiences in cataclysm? I'm pretty lost on how well these two classes perform since I've been out of the loop for a while.

[Azshira]

This really is not a raids or dungeons question. Check out the relevant forums cheers.