I'm wondering if anyone has used an aftermarket security system in their home? I am deciding if it is something I want to invest some money and time looking into. I probably don't need the professoinal systems with monthly monitoring, just something that will give my wife and I peace of mind. So being aftermarked I'm assuming it would have to be a wireless setup, as I don't want to go cutting holes in my walls to get everything installed. Thanks for looking, and I look forward to hearing your results.