http://www.pcmag.com/article2/0,2817,2388652,00.asp?mailingID=2972E259281317304CCB00F8678E1668?mailing_id=1131188 

Actual testing rather than opinion.

Short version.  AVG 2015 free best at real time and Malwarebytes best at cleanup.

Read to confirm my comprehension of the article.

Personally I run Comodo free firewall and AVG 2015 along with some plug-ins; Web Of Trust  (WOT),  AdBlock Plus, Flash Control.  I did run FlashFree but it messed up AgTalk in the way messages were displayed.