I've got a home security dvr that records from multiple cameras and makes the video available on bnc and vga outputs. I'd like to run the video to three monitors/tvs in different rooms. I haven't bought the monitors/tvs yet... but the majority I'm looking at seem to have vga and rca inputs. Any recommendations on an efficient/cost-effective way to get the video from this dvr to multiple monitors? There's alot of coax here... can I leverage those cable runs?