I don't normally comment on virus questions because working for one of the big virus companies I am inevitably biased.
However I do feel I should point out that saying I use X and have never had any trouble isn't a particularly good basis for evaluating anything.
If you have a look here:
http://www.virusbtn.com/news/2008/09_02
You'll see Virus Bulletin's test results - VB is pretty much a standard in the industry - they know what they're doing testing products unlike most of the stuff you'll read in magazines.
VHG's recommendation of Avast and AVG is interesting because although Avast did well AVG put in a woefull performance of missing 13% of adware and spyware and a pretty poor malware result.
A lot depends on what you're doing on line. If you mostly send e-mail and use Office and browse gardening sites you really don't need to worry.
If you download games and hacked software and visit adult websites - you probably need good up to date security.
Best of luck