Firewalls are good to have anyway. We have Zone Alarm. My dad is one of the best people when it comes to keep his computer clean and all that stuff. His kinda paranoid but anyway.

Norton is good, it comes with a firewall, doesn't it? I don't like it though...My dad always says I get virus from sites I visit. I usually go to all the same ones though so I duno.

As for AVG and norton..you should go with one. I don't know if it will conflict, but I've never really went with 2 ones before. It might tell you to delete it, not sure. I think the norton one should do fine