Go with I would go with Kaspersky minimal drag on system performance excellent updates, awesome firewall, good customization. My friend had mcaffe and well he got a virus. I have never got a virus and kaspersky tells me the ip addresses of the hackers who attacked my computer beat that. Plus it is rated number one in pc world magazine
I have AVG free now it works perfectly fine. Used to have AVAST but it consumes alot of my resources hence switch to AVG.
Avg and Clamscan are free antivirus wares.. But Clamscan has a problem of conducting scans so regularly that it lags my computor..
I use McAffee Security .. and i think it's a very good programm...Since i used that i never have a virus or something else...