A lot of the Blue Chip corporations seem to go for NAV or McAfee, or so I have found when I worked for them.
One of the best, many years back was Dr. Solomons AV but Symantec bought them out.
As for the reviews on who is the top one, I think you'll find that different sites have different winners -
CyberNets review, and the list will go on if you keep searching.
Read a few reviews and choose whichever one you feel most comfortable with, thats my advice.