Here's a quick breakdown of my home system:
Mostly Axis and Avigilon cameras, all with 128GB SD cards for edge recording.
All cameras are mounted in secure housings, with cable whips in armored flex cable (pressurized), with pressure-loss sensors and tamper switches on the housings to prevent (or more correctly, minimize) the chance that an attacker gains access to the security network through the exterior cameras. Interior cameras are currently a little less secured, but I may go back and fix that.
Cisco 3560 switch with Cisco RPS 2300 for redundant power. Switch and RPS are on different power feeds (mains power, and solar backup, respectively) in order to minimize any video outages from power failure, storms, or focused outsider attack on local grid. The solar panels are mounted on top of the roof with batteries and inverters in a fortified outbuilding with power cables 56" underground in armored conduit.
The recording network is airgapped from the main house network, there are viewing stations at various points in the house. These run on PC's located in the equipment room (more on that below) with KVM extenders in order to prevent the need to extend network outlets to unsecured parts of the house where visitors or staff sometimes are unmonitored. Network also utilizes per-port MAC authentication and other security measures, but still, I prefer to minimize the accessibility of the core network as little as possible.
Avigilon ACC on Windows 8 and Exacq on Linux (Ubuntu). Both of these servers also have dual power supplies for resiliency. The mixed architecutre ensures that any bug related to either the NVR software OR the OS platform minimizes the chance of loss of continuous recording. All storage is on a dedicated RAID10 array for each storage server. With the SD cards, and dual recorder platforms, the chance of recorded video loss is relatively small. I'm investigating leasing a local dark fiber loop to also have real-time remote recording for all cameras (27 cams total, didn't mention that above). All recording is continuos at full-res and max frame rates, storage is sized for 60 days of retention.
Equipment room/wiring closet has an automatic fire suppression system and dedicated cooling equipment. Acces to this room is via the master suite, both of which require biometric access.
So far things are working pretty good, but there are a few components I'd like to beef up. The system did come in handy, I recently caught my neighbor blowing some leaves into my yard.
Let me know if you have any questions about my system.