When I went to buy GoW1 I had the choice between a new Standard Edition or a used Limited Edition for the same price, so I just went with the limited. I really enjoyed the book that came with it, it explained the story pretty well and was nice to look at. I really need to understand the story before I can get into a game so it worked out well.
Im most likely going to pick up the Limited Edition again, assuming they have some left and it has some good content. If they have a nice little book again I'll be pleased
Although a little more couldnt hurt.