I don't know if I would vote for either of them -- depends on who all runs and who can keep it together. I was really close to voting for McCain last time around but he seemed to get flustered too easily at times. Also his attitude toward Putin. Didn't like the idea of another Cold War starting.
If Biden ran I'd probably vote for him. I mean, at least that way we would have the full story on things regardless of what the Press Secretary is allowed to release.