Hello Dave,
I've been running Norton Antivirus products on my computers since 1995. I have NEVER had a virus infection that Norton didn't detect, delete, quarantine or deal with.
It's a no brainer for me, all of my upgrades are to Norton AV products. I don't upgrade every year... usually about every 2. I am currently running Norton Antivirus 2003 and will probably upgrade to 2005 this upcoming summer.
Just my opinion. Hope it helps.