Analog or Digital?
Using screens with VGA (analog) versus HDMI (digital) inputs mean they will be a lot less susceptible to interference from other devices. Branches have all sorts of electronics that can cause interference with the displays such as: copiers, printers, computers, fluorescent lighting, electrical wiring, and so on. All of these send out interference that can cause the image on the screen to flicker or become discolored. To help combat the interference, shielded Cat 5e or Cat 6 cables should be installed in the walls. Shielded cable has a special metal jacket inside that deflects interference from other devices. The cost increase for the shielded cable is small. Also, two runs to each screen location allow for expansion and upgrading to digital extenders in the future. The cost impact of two cable runs versus one is minimal.
Construction of the building also affects cost. It is best to avoid brick or concrete walls since running cable and hanging screens is difficult and expensive. Optimal screen mounting surfaces are typical drywall and stud construction.
When cabling is installed for the new screens, it is best to have all outlets and data jacks recessed into the wall. This ensures there will be room for the cables and equipment that will go behind each screen. Having at least 1 inch of clearance between the screen and the wall is best to avoid crowding and heat problems with the electronics. Check out the image for an example of an optimal installation of cables behind the screen.