I am running:

Paladin, Resto Shaman, Ele Shamn, Arcane Mage, Destro Warlock.

I have an 80 Druid and a 70 Priest. I'm thinking of swapping out a Shaman for either the priest or druid to be a healer.

Sounds like quite a few of you recommend Druid. I would then have the option of Druid DPS/Shaman Healer or Druid Healer/Shaman DPS.

Having trouble deciding. Basically my ultimate goal is having different dispel mechanics and CC available in Cataclysm - plus I like the challenge of mixed classes and love the concept of having Portals and Summons for the new massive world of Azeroth.

Can anyone offer any advice on Druid vs Priest vs Shaman?