I'm using MacAffee Security Suite for Virus Scanner, Firewall, Privacy, Spyware detection.

BUT

I've un-installed the Spam filter. It is a huge resource and (especially) processor hog and I didn't find it adding much value to my shedload of anti-spam rules in Outlook; in fact I was always checking the spam it had removed to see if I agreed with it - and usually found myself disagreeing.