Sorry to hear that. I've used alarm systems in my home ever since I became a homeowner in 1995. I don't deceive myself or get a false sense of security yet my wife feels safer. (I feel a good dog is a better deterrent, especially one that barks at strangers. Great companionship also (assuming you like dogs)).
We use ADT and have been satisfied yet in the office I use a local company and am equally satisfied. Protecting the office is important since if your computer is stolen, your patient's data can be compromised. About a year and a half ago, someone entered the office on a Saturday and the alarm stopped them cold in their tracks. (Never caught them however).
Which reminds me, did you figure out how they entered? If they appeared to have a key you might wish to rekey your locks. Of course the police should be able to give you all that information. Do be aware of your surroundings however and pay attention to the people in the background around you. I don't wish to make you paranoid or neurotic, yet I'm former military and we are trained to have "situational awareness" at all times. It's a good skill to have, and the type of break in you describe does make one wonder whether they were casing for a larger robbery or if it was something more personal. Be safe and here's hoping it was just some kid who didn't know what he was doing.