Antivirus and Firewall

Hello /comp/
Recently I formatted my computer about 7 times. haha.
Now I need to know what kind of Firewall and Antivirus I should get.
I am temporarily using COMODO Firewall and Avast! Antivirus but I would like to know which programs I should be using.

doesn't matter if it's freeware or not.

I'm using Comodo now and Avira Antivir right now... They seem to be doing their jobs well enough.