I don't know where to put this for sure, or if this is allowed I came across this site a few months ago .www.homesecuritystore.com
Was looking for a security system for my shop,as far as I'm concern this is the place. They have tech support and will support anything they sell,plus a forum somewhat like ours,and have since bought a used system from one of the moderators no problems what so ever.
I took my time and at first felt somewhat over my head, however if a person has basic understanding of wiring and electronics it wasn't that bad.
I guess just thought I'd mention it now looking at something for my house, and you can save some money if your thinking of something like this if you do it youself.