I need to replace several (about a dozen) DVR units in various U.S. locations, I am searching for resources to decide which brand I can consider. 
  
The units I need are standard BNC connections, 8 or 16 channels, HD / 1080p and most importantly, must have interface software that works.... easy to export, remote viewing, etc 
  
I've started looking at the retail brands....  Swann, Lorex, and others found on Amazon. 
  
I am skeptical on using other lesser known brands without reviewing what others have experienced.  
  
Thanks for any guidance