Alarm One. Everything in the house wired (windows, doors, motion sensors, heat sensors) . Fire, carbon monoxide, and propane sensors included. All integrated with a LCD touchpad and my phone. Also interfaces with central air, some lights, and a few of the plugs in the house.
I love the setup, and couldn't live without one now. What I pay for monitoring services was more than discounted in my home owners policy, making that part of it net free. The hardware I own, so that's a different story.