I've worked for a computer vendor before and had the chance to experience many of the antivirus leaders out there. I was very pleased with the Sophos product...their product always seemed to be up to date and relatively easy to implement and use. At my current job we use Norton Corporate Edition on our workstations and servers, and we also run Trend Micro's Scanmail and Interscan Viruswall for our email. I actually like the separation of duties between the two products, one email, one workstation virus protection. Trend has a solid product. Norton is good...sometimes hard to implement...but, I've been pleased with the technical support (my biggest grading factor for software and hardware). Honestly, I'd prefer to have Sophos, but this is what I inherited.