Honestly i have never been so over the fence on something like this, i usually just buy games when they are on super cheap offers (Bought Witcher 2, Deus EX complete pack and Fable Lost chapters when they were on 75% off), but this pineappleing pre order its just tempting the pomegranate out of me.
First of all the preorder its only 40$, which quite frankly its somewhat cheap compared to other similar "Quality" games.
Second is that there are tiers of preorder, and right now its on Tier 2 Ergo Free OST and artbook + DM4 or RE5 depending on your region. Thats basically 60 to 70$ worth of stuff for only 40$, but there is a third tier which gives you a season pass for 4 multiplayer modes DLC, and my experience tells me a season pass can usually be of Equally or half the price as the regular game. So its a possible 90 to 110$ worth of content for this thing...
The sad part is that i only have 54.40$ im my steam wallet (And i doubt i can get anymore this year unless i get a credit card and do the proper process that allows me to buy $, but its highly improbable if i may say for this year), and im still waiting for at least the Starbound release, and i need like 15 or 20$ for it so i can buy it just when its fresh (Stupid overhyping of the game making it look awesomely awesome).
pomegranate is a difficult decision mang, i usually navigate the 7 electronic seas for my booty, but i just can't refuse a good offer when i see one :X.