My vote also goes with NOD32, I have been using it for over a year now and gotten my family and most of my friends switched over.

None of us have gotten any type of virus since.

With daily updates and very low footprint it is hard to beat. I find it disturbing that NOD32 is left out of many of the reviews and comparisons I have read since I switched.

It really is great anti-virus program.

On the free side AVG Free IMHO is the only way to go.