I went with SafeMart. You can buy all the stuff online and install it yourself. The monitoring is with Alarm.com. I pay $480 per year all at once. I spent $2400 on the window and door sensors for 20 windows and doors, two cameras, motion detection, water sensor, temp sensor, a couple of wall outlets to control lights, and a thermostat.
All battery powered, wireless.
Pros: save money
No wires or drilling
No installer in your home
Support was great
Its awfully easy!!!!
You can arm the system with or without motion detection, a must for dogs!
Cons: you have to do it yourself
And you gotta have patience
Adding the remote cams to your WI FI is tricky