I would agree that PL 8 sounds good.
I also agree that Elephantmen is excellent. One suggestion that I have would be to set the game in the same period as the comic. One of the things that makes Elephantmen so good, in my opinion, is the way that it takes the story in a different direction than we expect as the reader. Instead of being a story about the war itself (aside from "War Toys"), it primarily is a story about the rehabilitation of the Elephantmen after a cessation of hostilities. If you set it during the war, you're probably going to have a lot of problems trying to give any of the characters meaningful reasons for human emotions or to give them much of a background. Asking players to think about what the experienced during the war, how they are dealing with integration into human society, what they think about their past, and so on is a good way to add the character development that the comic offers but an adventure set during the war wouldn't be able to deliver as easily.