I work for a business that is receiving quotes for a new CCTV system. The two quotes received are (Avigilon 3MP Cameras) and Dahua 4MP camera system. A quick search shows that Avigilon is a superior product, but is it really necessary. System design has 16 cameras (8 indoor/8 outdoor) with a 64TB DRV. The Avigilon System is being quoted at $30000, but the Dahua System is around $16000. Interested to hear your thoughts and opinions on these two systems.