Night Elf Mages were another race/class combo that became playable in Cata, although I don't see many around. I was trying to get a Highborne look, with bright, glowy, arcane like colours.
Hallowed Garments
Mantle of the Tempest
Crown of Endless Knowledge
Belt of the Depths
Arcanist Gloves
Xintor's Expeditionary Boots
Saronite Spellblade
Prison Manifest