Looking to buy an off the shelf security camera system, wireless preferred. Too many break-ins around these days and a kid on the way At least 4 cameras, 8 preferred. Thinking I am just gonna grab something off Amazon but there is like 10 million of these things on there and my knowledge of them is limited. Certainly need something weatherproof, two way audio + remote activated siren would be great, full HD or 4K. Looking for suggestions.