Composite is fine, we use it for videonics tricaster and vt5 remote work. we have 75 foot cables, but sometimes need to run longer. its not SDI quality but we get good results, match the cameras up first. Schools use S video for up to 25 ft runs but you can mix the cables and not see a big difference. the light and exposure have a bigger effect on the look than the cables connecting them, at least with DVX100 and XL1 cameras. good BNC connectors on a composite cable holds up better and is easier to repair than an S cable.