It depends on your specific needs and budget. DVR (Digital Video Recorder) systems are generally less expensive than NVR (Network Video Recorder) systems, and they are better suited for small to medium-sized businesses. NVR systems, on the other hand, are better suited for larger businesses or organizations that require high-resolution video and advanced features such as remote access and analytics. NVR systems use IP (Internet Protocol) cameras, which are more expensive than analog cameras used with DVR systems. Ultimately, the decision between DVR and NVR depends on the specific requirements of your surveillance system.