Question about CD Keys

Not sure if this is the right spot to post this, so move it if it isnt please.
I have the preorder version of the game (from EB Games). I recently found a store that had 3 copies of the Collectors edition. I was wondering if I picked up the Collectors edition if I could add that CD key to my current account and have both the Ithas Bow and the Aura? I heard from the rumor mill that it was possible but wanted to get some opinions before I spent $80 on the art book

Thanks in Advance

You will get both. Your accounts already has the preorder key put in, which means you will get the Ithas Bow whether you get the normal version of the game or the Collectors version. When you buy the Collectors edition and enter the key to your account (log into your preoder account and use the Edit Account button), the game will know you have a Collectors edition key and will let you use the Aura as well.

Thanks just wanted to be sure before I spent the money.

In this same area, you can have multiple pre-order keys entered which will give your new characters multiple pre-order items.