We are a school district and at the end of every school we get hit with a virus. We've already tried two products Lightspeed and Forefront. Neither were able to stop viruses. We are looking for the most recommended AV solution to protect 100+ servers. Management would not be open to anything from Symantec. We did have MacAfee at point that the company liked, but had to get rid of due to cost. I've seen suggestions of Panda and AVG. My biggest concern is that the AV be able to stop emergent threats, not necessarily old ones.