I'm listening to the comp now. Depressing seems to be a quality of a post-apocalyptic scenario though, so I don't know if I agree with you on the Portishead song, but I'm not through the comp yet so I'll reserve my opinion and guesses for after.
So far I'm liking the tracks in this. I'll probably do a re-arrangement of them and post my version of the order and if anyone wants to try it that way, sweet. Maybe we can exchange song order lists and try the comp(s) in different flows.