I'm thinking about getting an alarm system installed, I'm moving to an individual house which although it's in a good area and has all the usual stuff like modern doors and windows, I feel that it has many more potential entry points than my current place, it's much bigger, plus it's more remote as in nobody can see most of it.

companies I've looked at Dialarme, Securitas-Direct, GPA .. All offer similar monitored systems but none have upfront info about pricing and contracts.

Any experience with these? Costs etc ?