A bit late, I'll admit, but I wanted to mention one thing about AntiVir Personal vs AVG ...
I had AntiVir Personal installed on a relatives machine for some time, and while it was quite nice (even though the GUI could need an upgrade from the Win3.11 look), it had a really silly update procedure. They were connected by 28.8k modem, and AntiVir Personal insisted on downloading a complete 4.5mb installer and reinstall itself each time it was updated
After switching to AVG, it's usually a 400k virus definition update, which is much better
Of course if you're on a cable connection, it doesn't matter much