Modems
USR5610B PCI Fax Modem(No Voice) with controller, available from newegg $70
takes a load off of the CPU when doing modem stuff. required for LINUX, speeds up at least dialing and maybe(? I doubt it) internet for slower PC's.
Zonet ZFM5620-CF Conexant/Rockwell Modem, available from newegg $11
The $11 modem. controllerless standard winmodem.
Zoom/Hayes Accura v.92 H08-15357-C PCI Faxmodem, available from newegg $34.98
more fully-featured faxmodem. has trialware firewall & AV software. has fax comm SW. controllerless winmodem. great for faxes.