Appeal to the Masses: Antiviral / Malware / Internet Security

Norton Internet Security recently reminded me (in a pop-up) that I paid for the privilege of dealing with its irritating pop-up messages, cycle-stealing "idle time" scans, and unforgivably bad GUI almost a year ago. Would I like to give Norton more money and renew my subscription?

Gentle readers, I would not, if there is a better option. CNET likes Avast, so that's my first choice. I would be pleased to read about your favorite internet protection software in comments. Anything free / cheap, or with high marks from reputable reviewing agencies, gets bonus points. Suggestions without links to the software and/or reviews will not be taken as seriously.