If you want a suite, I've read good user reviews (as opposed to "tester" reviews - sometimes sponsored) of the Norton 2009 products.
There are also very good free AV's around, and free firewalls and demand AS scanners if you want to build your own security package.
I have four different security programs that I can install on my computer and the McAfee that came with my computer has recently expired. I can't decide whether I should renew it or use one of the others, so I'd like to know which of these is the best:
Webroot Spy Sweeper
Windows Live OneCare Service Desk Edition
Norton Internet Security 2008
McAfee Internet Security