BitDefender is the leading security solution among other renowned vendors. The newest version is BitDefender 2012 Beta, however, it is highly recommended that you should use the stable and strongest one 2011. In the family of the application, BitDefender Internet Security 2011 is considered the best one.
Of course, you get what you pay for and that is the reason why this version has the higher price than its brothers. I am a loyal customer of Kaspersky but it does not prevent me from using, specially testing other products in the same category. In the case of BitDefender, I have to confess that I completely respect the giant, its name and the powerful products they have made.