Hey - what a great thread - I love post apocalyptic literature. In high school, the only book I enjoyed was Alas Babylon - that and A Swiftly Tilting Planet (and Star Trek reruns) were what started my addiction to SF (I know, A Swiftly Tilting Planet is fanatasy, but at that I age, I couldn't discern).
Anyway, to add something productive - there is Plague Year
- it's ok, not great IMO and it sounds like you have a huge list to work through already. And there's also Oryx and Crake
that people seem to really like - I didn't like it much but as I said, the reviews seem to be really good.
And, speaking of Star Trek - I got teary eyed when I heard Spock say Live Long and Prosper - it hit me that I might not hear him speak those words in another movie.