Sundered Veil - P39 or Cortex

So I picked up the Cortex Core Rules at GenCon. These are the rules used in the Serenity, Battlestar Galactica, and Supernatural role-playing games by Margaret Weis Productions. As I was looking through the book I realized the rules would be well suited to my ideas for the Sundered Veil campaign setting.

Crunch work would be tuning the magic system, coming up with the spells, tweaking advancement, and building my bestiary. Fluff work would be the same regardless of what rules I use.