If you are with comcast and are going to upgrade to HDTV, you will get component and optical cables with the the HD cable box.
DVI-I cable (carries both analog and digital signals) can only be used with DVI-I connectors. Generally a TV and a PC graphics card that has DVI will have DVI-I connectors. The DVI-I cable (male to male) has male pins for both the analog and digital signals.
DVI-D cable (carries only digital signals) can be used with either DVI-I or DVI-D connectors. The analog pins do not exist on the connector. Typically you find DVI-D connectors on the back of cable boxes.
DVI-A cable (carries only analog signals) can only be used with DVI-I or DVI-A connectors. The digital pins do not exist on the connector.
If you are connecting a PC to a TV, you should be able to purchase any of the above cables and they should work. However, make sure you TV supports both analog and digital before purchasing the cable. According to the specification for the LC2600N, the connector is DVI-I so any of the above cables should work. Make sure you set the TV menu for the DVI connector to accept the type of signal that you are using (something like PC digital or PC analog for 4:3 screen displays and AV digital or AV analog for 16:9 screen display). Your TV may not have all 4 options but combine all resolutions into analog or digital.
Another possible cable is the VGA to DVI-A cable. Use this cable if your PC graphics card does not have a DVI connector. Again make sure the TV supports analog.
Generally you should be able to find very reasonably priced DVI cables and 3 wire component cables on the Internet. I've purchased all different types and lenghts of these economical cables and have never seen any difference between those and the high end cables.
DVI-I cable (carries both analog and digital signals) can only be used with DVI-I connectors. Generally a TV and a PC graphics card that has DVI will have DVI-I connectors. The DVI-I cable (male to male) has male pins for both the analog and digital signals.
DVI-D cable (carries only digital signals) can be used with either DVI-I or DVI-D connectors. The analog pins do not exist on the connector. Typically you find DVI-D connectors on the back of cable boxes.
DVI-A cable (carries only analog signals) can only be used with DVI-I or DVI-A connectors. The digital pins do not exist on the connector.
If you are connecting a PC to a TV, you should be able to purchase any of the above cables and they should work. However, make sure you TV supports both analog and digital before purchasing the cable. According to the specification for the LC2600N, the connector is DVI-I so any of the above cables should work. Make sure you set the TV menu for the DVI connector to accept the type of signal that you are using (something like PC digital or PC analog for 4:3 screen displays and AV digital or AV analog for 16:9 screen display). Your TV may not have all 4 options but combine all resolutions into analog or digital.
Another possible cable is the VGA to DVI-A cable. Use this cable if your PC graphics card does not have a DVI connector. Again make sure the TV supports analog.
Generally you should be able to find very reasonably priced DVI cables and 3 wire component cables on the Internet. I've purchased all different types and lenghts of these economical cables and have never seen any difference between those and the high end cables.