I'm planning a ceiling-mount projector on the concrete stoep roof, with pull-down screen some 4m away. The main use of the projector will be for ornery TV/sports, but I also want to use it for PC media centre movies and even PC data. Distance from ceiling mount point to PC/decoders is approx 15m. What video cable should I install from the PC and decoders to the projector? Audio of course goes separately to amp & speakers - it's only the video signal that I need to get to the projector. Most of the run is in a regular electrical conduit in concrete slab, so we are restricted. I'm open to any suggestions, including even 2 x Cat6 or whatever's most flexible. Any advice and comments most appreciated!