Valhalla Armor Set

[oas]

I'm planning on buying the game this weekend but I read in the official site that there are 2 versions.

"The game will come in two editions, the standard edition and the special Valhalla Edition, which includes:
Valhalla Armor Set. These unique in-game items are an armor set the hero can collect in the course of their journeys. Combined together these artifacts give additional a strong boost to the character’s attributes.
Digital artwork and wallpapers. Digital bonuses: Ultra-high resolution artwork depicting an epic battle of Olaf and the Valkyries against undead hordes, and wallpapers available in all popular desktop resolutions."

Which version should I buy??
The armor appears right when I start the game or it takes a while before I can use it??

Is the armor worth the extra price??


Thanks