I've been running avast!
http://www.avast.com/ anti virus for about a week now. The home version's free.
I'd been happy with AVG free version for ages but decided to play with this prog.
So far its good, it found a trojan with the initial scan - I assume AVG missed it, it was spyware, I think.
Compared to AVG theres a lot more settings to fiddle with. Its updated 3 times so far.
It integrates with Outlook and theres a wizard
which links it to Outlook Express.
It picked up Swen twice in emails yesterday!!!
Maybe you could add it to your list and I'd be very interested to hear if anyone else here has tried it.
Cheers