No, not really...
I like the idea of having layered defence...
this means 1 program as firewall, 1 Antivirus, 1 Anti trojan, 1 spyware killer, 1 scriptblocker, 1 popup blocker. etc....
Having a configuration like this, means that in a possibel infection, not all programs are shutdown by a potentional malware. And you come out defenseless
Like Paul Wilders says : Never put all your eggs in one basket
Waldo