I would be careful with either company as I know for sure that ADT will make you sign a contract and their monthly fee is not cheap...they may install your system for something like $99, but in the long run, they are more than making that money up in their monthly fee. I don't really know anything about Brinks. However, I would like to put a good word in for my husband...he has his own business installing security systems. He has been doing this for 10 plus years...he works with a lot of builders in the Naperville, Elmhurst, Hinsdale, Plainfield area and I'm sure he could give references if you would be at all interested. I do know that with the cost of the system (which depends on what you want) the first year of monitoring is included, and after that it is only $240 a year which works out to $20 a month. If you would like more info or his direct number, please let me know.