Next book to read?

[BigJ]

So I'm about to finish up Dark Tower IV, and have at least 20 books sitting around that I haven't read yet. Out of these specific books, which one should I read next?

Tom Clancy: Rainbow Six
Dune
Angels & Demons
Holy Blood, Holy Grail
The Magic of Recluse
Brimstone
Freakonomics
The Belgariad Series