My vote went to the OCR-Map, I really liked style and execution ...
Runner ups: "The last stand" and "The night at the opera"

The "Post Boson" map has a great idea but it looks somehow unfinished to me - especially the way the text is placed...
"Ultimate Doom" is also a nice idea, but ...
PostAmerica map would have been great too, yet it is unfortunalty not finished.