Of all the photos that I can actually, see I like #4 best of all. With this piece of wood, you have to be careful about the sawed off points which can really detract from the overall aquascape. Hide them by planting tall plants around them or, better yet, wrapping them in moss or Anubias barteri var. nana. How big is the tank this driftwood is going in, by the way?
Hope others will give their opinions on this piece of wood.