I've uninstalled AVG Anti-Virus and ZoneAlarm Firewall, to give Avast Anti-Virus and Comodo a go. AVG has been fine except for the annoying morning update, but Avast picked up two trojans, that AVG didn't. Mind you, I'm not that sure they're trojans.
I've been happy with ZoneAlarm, but Comodo ranks much higher in this test, so let's give it a go. So far so good.
I hope the Global Geeks are right.