When it comes to security, the more physical the better. Wireless might seem a attractive on cost and convenience but reliability and vulnerability increase substantially. Again on that theme, the more complex a system, the more that can go wrong. It is all a matter of personal acceptance of a level of risk, but I'll stick with hardwired systems on a UPS and two good-sized dogs which gets me and my family to a comfortable sleeping level. that and Mister 12-gauge full of #00 buckshot and slugs. Your mileage may vary.