Hi! 
  
I'm looking for a good 16 channels camera security system. 
  
I know nobody can say which one is best but I'm not looking for the best!  I need the following specs: 
  
- Good image quality with H.264 compression. 
- Adjustable frame rate (from 1 to DVR's max) (per camera if possible!) 
- Internet remote viewing (image quality can be lower on this) 
- USB port for backup 
- Record on motion detection or alarm trigger 
- Possibility to set some cameras to be on/off depending on day time 
- Possibility of changing the Hard Disk or a free space for another disk 
- Possibility of selecting the number of camera monitored on screen 
- If cameras are included, need some night vision ones 
- STABLE (a security system ain't secure if it's crashed!!!) 
- From a company which cares for it's customers! 
  
I don't really care about the length of camera cables included as I can do my own cables if necessary. 
  
You can look at the following system: Search for QSD2316C16 on tigerdirect.ca.  I liked this system until I read the reviews of people who bought it and had a lot of problems and no decent answer from the company. 
  
If the DVR could mirror the main hard disk on the second one, it would be a plus! 
  
I can go with a good budget but not infinite. I don't want to spend $15000 on a camera system! 
  
I read on another thread someone talking about POS integration.  I don't know what are the benefits of that.  Someone could explain please?