House alarm... worth it?

[bigandclever]

I'm assuming the answer will be 'Yes', but which type?

DIY, wireless (Yale Digital)... about £400 outright purchase, no monitoring or maintenance

Installed, wireless (ADT)... about £1000 for 3 year 'rental' incl monitoring and maintenance

Installed, wireless (independent reseller)... about £800 purchase plus £750 3 years monitoring and maintenance

Or should I be looking at wired?

[bigandclever]

I'd like to say the area's fine but after someone coming into the back garden and nicking my bike (while we were in) the missus is a bit twitchy. I'm pondering whether a couple of dummy boxes will be enough of a deterrent, or whether just to get something put in for the sake of a few quid. Mind you, I'm also tempted to get some security shutters on the back. Like these, but with slats in to let some light in...



Having a bit of a circular argument with the missus on that one... she says she doesn't want them becasue they're ugly (they are); I say I want them because they're prettier than what some ratboy would do in the house, if they ever broke in.