I echo the sentiment that you should probably get Dead Rising 3 of the two. I have yet to play Dead Rising but having played Day Z I would have to recommend waiting until the game is more of a game than it is at the moment.
Wow that seems like an unreasonable reaction. I mean why would I want to listen to a podcast that spoiled things I want to play, or watch or read. I'm not going to send someone an angry email about it but still I wouldn't really like it if they did.
Also why would you want to listen to a podcast where people describe things that happen in media? Seems to me like you would be better suited to enjoying the media instead of listening to someone else's thoughts on it.