I'd highly suggest Frontpoint - Alarm.com. Self install cellular system that has phone app applications.
Why we liked it:
1. Cellular system - works if power, phone lines are cut or "down." Each unit sends signal through to company, not through your "box" so, even if someone breaks your control box, it still works.
2. Garage - we have sensors in our garage - with tools, expensive maintenance equipment, yada yada, I wanted my garage on the system. With the remote app you can disarm/arm your system in your car, and we have sensors on our garage doors and windows.
3. Separate codes for separate people. You know who is coming and going. You can give family members their own unique codes, so you know who is coming and going from the house.
4. Install was easy, and we can add to the system anytime we want by just buying a device and linking it. For example, we started with glass breaks for big areas, but are slowing adding window sensors.