I had Monitronics for years, and I do not recommend them at all. They were fine when I didn't know any better but canceling them was a royal pain in the arse.
I had them for 5 years and had a co-worker mention that he had a smaller/local company for less than half the price (90% of the reason to have the system is the monitoring sign in the front lawn and the insurance discount since any really good thief is going to kick the door in, and be out of the house long before the cops arrive). When I tried to cancel they didn't cancel with the letter I sent because the signature didn't match the contract I had signed 5 years prior (I had decided that I didn't like the palmer cursive letter for my formal first name and made a slight modification to my signature), and they didn't bother to inform me of this in any way other than sending me another bill. Never mind the fact that I knew the system password, and had all of the billing details and they had cashed checks for the last year or so with a signature that matched the letter. Somehow knowing the password was enough to keep the cops from coming but to cancel my monitoring practically requires DNA proof of my identity, because thieves will take the time to learn the password, and then they will evidently try to cancel your monitoring rather than just break in and answer the phone with the password to keep the cops away.
I don't think I've ever been as pissed off at customer support as they made me. Of course when I mentioned the new rate I had they offered to lower their rate, not matching but quite a savings, but that does nothing to endear me to the company either, since they had a slight rate increase at yearly intervals, but somehow can manage to lower their rate by a substantial margin when I'm ready to jump ship?
I'd recommend my current service highly, because they are quite affordable, but unfortunately you are not in their service region. My biggest recommendation would be to rate shop yearly once you own the equipment (if they will be installing it since most will give you the equipment for free after a certain number of years being monitored) and call your service to see if they can't reduce your rate at all.