We have a CCTV system, or had one until lightning struck the house last week. We lost the TV, DVD, Cable, Phone, Roku and Oui game box. And most important to me the DVR for the CCTV system. It was a Samsung SDR5001N 16 channel unit, no word on the cameras yet. I want to replace it with something similar if not identical. Anybody here understand the ins and outs of these things and could recommend one over another?