If you already have antivirus, its only $30 to protect your network and users:
Family Protection Package (no software installation required):
    * $30 for unlimited PC's and devices
    * Comprehensive, whole home protection with:
          o World Class Parental Controls
                + Filters PC’s, Mac’s, Game Consoles, WiFi-enabled devices
                + 62M URL’s automatically updated
          o "Safe Surf" blocks malware, phishing, hacking sites
          o Internet Usage Time Scheduling
          o Web Activity Reporting
          o Parental Alerts via e-mail and text messages
          o Web-managed Dual Hardware SPI firewall
          o Remote Web-based Management Console
                + Includes automatic network mapping
                + Allows remote monitoring and
          o Application Control (Blocking and Scheduling)
          o Access Control
          o Anti-Spam Controls
See that would require me scrolling down to read $60 for 3 PC's!!!! LOL. When I read that a while back I never saw the price. I searched google and found info on secure spot but the part that was never clear to me was that if it would cost more for us since it was a firmware upgrade. I thought maybe for others it was an added bonus of purchasing Dlink's router. 
Anyway, thanks for the info. I love the DIR-655 but based on what I 've read it is not necessary for my setup.
Cheers.
Lucid.