I've never installed a PTZ camera before. I have two Hikvision 7616 series NVRs. I want to get a PTZ camera with auto tracking because I don"t see much of a point getting one without auto tracking. ADI has the DS-2SE4C425MWG-E for about $450 which doesn't have auto tracking. the Hikvision camera that does the DS-2SE4C425MWG-E is listed about $2,600. A big price difference. I was looking at an alternative the Dahua 6CE445XANR Pro-Series Starlight for $1,300 which has auto tracking with a lot of other specs that the Hikvision cameras don't have but I don't know if it will work with my NVR. Please offer suggestions on a reasonable PTZ camera or telling me if that Dahua camera will work.Thank You in advance.