I purchased a Tiger Security DVR (digital video recorder) and high definition cameras through Amazon. I purchased the DVR without a hard drive and added a 6 terabyte Western Digital hard drive to the system. I added six cameras, using two megapixel cameras on the sides of my house, and five megapixel cameras in the front and rear, which cover the golf course behind my home and the street out in front. All of the cameras have infrared and motion detection functionality.
The cameras are powered directly from the DVR using an RG 59 cable. The cable is designed so that the DVR acts as the camera power source as well as the video transmission line back to the unit. Installation was relatively simple and you have the ability to set specific areas of each camera viewing area and sensitivity to send alarms. When a motion alarm is triggered, the unit can send you an email along with a photo of the area that detected the motion.
I have been using this unit for three years and other than having to replace, the external power supply one time at a cost of $14, the unit has performed flawlessly.
Bottom line is that there are a lot of great systems on the market. It just depends how much functionality you really think you need and what the intended purpose of the system is for. If you just need shopping for deterrence, one or two outside, cameras may be perfect for your situation. If you are looking for something that will record evidence of an event, or a crime, then perhaps more cameras and higher quality cameras, as well as offsite cloud, storage might be more appropriate .
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