Hi folks, I don't have any IP cams yet but am planning to get a few (between one and three) to monitor the front on my house. I've got a good router with an attached 1TB hard drive, and I'm wondering if I really need to add a dedicated PC running BlueIris or similar ... or if I can just use the onboard configuration on each camera to set detection zones and save video to my network storage drive. I guess the answer is that I can do either but there are trade-offs. So what would be the disadvantages of just relying on each camera's onboard system?