Toss $249.99 at Best Buy today and they will send you an Xbox 360 250GB Darksiders II and Batman: Arkham City Bundle. This is a solid $50 off anything comparable and is an excellent value for the top-end of the Xbox 360 system offering with two truly excellent games.
Be sure to check out the Kotaku reviews of Darksiders II and Batman: Arkham City to get you even more excited.