It really depends on what your surfing habits are IMO. Kaspersky is one of the finest and what I use because other people use my computer. If all you are doing is E-mail and This website among others then MIcrosoft Security Essentials is free and traps most stuff.
Right in the middle is AVG. Again free software along with their "Game booster and Anti malware" AVG's free utility has other benefits such as clean up, defrag, registry cleaning among other things.
Again it really depends on your habits
Anybody can become a woodworker, but only a Craftsmen can hide his mistakes!
The Bible tells us to love our neighbors, and also to love our enemies; probably because they are generally the same people.