You sound like a pretty good IT guy. Is it too late to switch courses? We passed up Pelco for an NVR/PC based system w/over 850 cameras. Virtual matrix, etc. I also agree, video walls are OUT. There are several good software packages, i.e. Genetec, Petards UVMS that will get you past the DVR curve. I'm thinking DVR's will be like VCR's in the near future....IMHO. We just finished a new casino that's 100% IP. It's a IT guys dream.... Good luck.