I am using Norton Internet Security 2004 Pro, it is the AV and Firewall package in one. But since I have multiple computers, I can only have that installed on two, the rest I use Zone Alarm as a firewall and Symantec Antivirus Corp. Edition (The licence I have allows me to use it at work and at home)
They both work fine, for some reason, McAfee doesn't find all of the virii all of the time but any AV is better than none.