I stick with Norton completely. I had McAfee a few years ago and thought it was utter garbage. The user interface was confusing, and it turned out that the program wasn't even functioning properly. I have never been let down by Norton, and give it two big thumbs up.
Remember, no Anti-Virus is good if you don't use it properly. First, be careful about where you travel on the internet. Secondly, make sure your anti-virus is updated and running frequent scans. It can't catch stuff if it isn't updated on what to look for!