Actually to say that we have a mage class dose not do it justice.
What needs to be done is to turn around and ask you, what kind of mage do you want to be?
Are you interested in pure single target magical damage? Weaking and slowing your foe's down with debuffs and dots? Do you want to be able to take on multiple foes at once? Maybe a pet? Or would that be to much like the Warlock or Hunter for your taste?
We have mages. Oh boy do we have mages.