Lets bump an old thread.
NOD32 on desktops.
Kaspersky on servers.
Symantec AV on Firewall applicance (SGS 5420).
However, I really enjoy using NOD on the desktops. Lite on resources, heavy on protection & auto updates really makes it a joy to use. 12 MB's of memory is all the resident scanner uses.
Being able to enable/disable AMON (Antivirus Monitor), IMON (Internet Monitor), EMON (E-Mail Monitor) & DMON (MS Office Document Monitor) with 1 click of the mouse is handy, as is the clean & organized interface.
With daily virus definition file updates pushed automatically to your system, NOD32 is kept up to date without user intervention.
When a virus is found by any of the monitors, information is written to the log file and a very clean, non-resource intensive window pops up, detailing the circumstances of the detected virus(es), the infected file(s) and offers to either clean, quarantine or delete the offending file(s).
All in all, a nice & effective anti-virus package.