Brinks and ADT are ripoffs.Check this site out
http://www.frontpointsecurity.com/ I have one of their systems and it is great.....light money,easy to install and good monitoring.
Also,check this out simplisafe.com/simplisafealarm .....best monitoring deal out there.Haven't used them but it looks good.
If you want to go local,I like Total Security.I have two of their systems and am happy with their service.When you call their office you actually get a person on the phone.
Also,google up "security systems complaints" and you'll see what I'm talking about with Brinks and ADT