It's funny to see this thread...I was looking at the other 'first pics' thread earlier asking myself this very question. Not a huge Metallica fan, but I do like most of their music. The pin however looks amazing, I'm really digging the LE version artwork and it looks fun. Buying both would stretch the budget away from other hobbies....damn you Stern.
I'll probably stay with Predator, but it'll be hard to read this forum through my veil of tears once the Metallica gameplay vids are posted.