I really enjoy caster/wizard stories they are my 2nd favourite type of stories to read. They can either go the fantasy or paranormal route which makes each story you read unique.
Some books that are Team Casters/Wizards:
Harry Potter Series – J.K. Rowling
Hex Hall – Rachel Hawkins
Beautiful Creatures & Beautiful Darkness – Kami Gracia and Margret Stohl.
The Secret Circle by L J Smith