Decking-what type to chose?

We are in need of replacing about 1000 sq ft of decking around the perimeter of our log home. We initially used material that were old telephone poles. We thought was a great deal at the time. Hind sight 20/20. They never kept a finish and the creosote leached out. This time around we are looking at either 5/4 cedar, green treated, or composite.

Does anyone have any good recommendations? Thanks.