Poll: What AV Do You Use?

Obviously we have split opinions about which one is better, and half of this subsection is talking about the same thing, "which is best" which is hard to argue. It's easier to find out which one is most used. I'm not sure if it's useful information, but I'm curious.

Oh, and please mention what you are using on post if you are using x64, since I'm looking for a good one to install when I install Vista Home Premium x64.