I currently have a Q-See packaged system that includes a QCK81-8HF-2 NVR with 8 QCN8093B-N cameras. I want to replace the NVR with a model from Dahua, LTS, or Hikvision and would like a recommendation on which model to go with. Will I be able to use the Q-See cameras with any of these NVR brands or will I most likely also need to replace the cameras?