I have had several DVR's over the years including Qsee and Nighvition and now want to upgrade to 1080p. I have a total of 16 cameras four of which have PTZ and would like to get a DVR that will be able to handle the old and new 1080p cameras. I would also like to use the standard BNC cables that have already been installed. can anyone recommend a good DVR ? I have looked at the Swann system and the Lorex system both have negative reviews and there online information recomends products that they have discontinued. I have also emailed both of them on tech-support to see what kind of response I would get and both have no response.