i've been working my way through some replacements for norton as well. I wouldnt recommend CA security or windows liveonecare.
I've found trend micro pc-cillin good for antivirus so far. These sites might help:
http://personal-firewall-software-review.toptenreviews.com/
http://anti-virus-software-review.toptenreviews.com/
http://www.virus.gr/english/fullxml/default.asp?id=82