Best home security system deals & price quote? ADT home security? Alarm company suggestions in Baltimore, MD?

This question is about Home security in Maryland’s Baltimore County. Thanks.

Best home alarm company? Service, install, and monthly price.?

I am about to buy a house and I am going to install (well have one installed) a home alarm system. What company is the best service and best price? I know about ADT and Brinks maybe the best but I was trying to see what everyone else is paying for their alarm.