The problem with the review sites is they consider ease of use, customer support, system resources, etc... in their reviews and not just virus detection. Not to mention a lot of reviews are just glorified advertising.
So check this out instead. A must see before choosing your AV...
http://www.av-comparatives.org/seiten/comparatives.html
http://www.av-comparatives.org/seite...se_2007_08.php