With a 5 Year Warranty and a MTBF of >10 Years, the ROI on the MOBOTIX M ONE makes it an easy choice. The camera works without any server and network connection (only power supply needed), the OnBoard Analytics with ActivitySensor and the MOBOTIX ManagementCentre are free and the Internal DVR (up to 1TB) does not require additional recording software or NVR. High-end audio with biodirectional and lip-synchronized are already integrated and an industry standard microSD 64GB is already included.
If thats not enough, you will always be up to date with free life-long Software & Feature Updates.