Anyone using a Pan/Tilt/Zoom camera? I guess the only way to get PTZ is to go with a network camera. I really like the idea of being able to PTZ so I guess I need to seriously investigate network cameras rather than fixed with a DVR card. Initially the high price turned me off. I was going with 3 fixed cameras - maybe 2 PTZ cameras would work instead. Can a PTZ camera be set to automatically pan or is it a static control?