Personally I prefer Panda AV for Networks, http://www.pandasoftware.com.
The workstation installs are automatic by keying them to the user login. The software will automatically setup a logon script that will run and install the software on the workstation at user logon. Using this method you can decide which users get the install and when.
The AV software is installed on the workstation without user intervention except for the reboot to finalize it.
Also the users cannot access the program files to change the settings. You control the software scans and behaviour from the admin panel at your workstation.