What is the best Anti-Virus program?

What is the best Anti-Virus program to use? I use Kaspersky Anti Virus 2009, it is a leading anti-virus software and Internet Security software solution for your home computer or business.

I use Norton and it works like a charm.

i am using threat fire and its ment to dectect any programe thats behaving stranglie and sqashes it flat...before it works it way around the system, it dose feel a bit strange not to go through the scanning everything but it workingg great...got it at threat fire. co or com