That really sucks about your house, sadly this kind of event is what most people need to live through to realize there home is unsecure. Security systems only do so much good, because from the small list of items, the person or persons were probably not in your home long enough to allow security or police to respond.
Your money would be better spent into a dog who barely failed K-9 training (yes, you can check around to find these wonderful pets up for adoption). My uncle uses two Doberman Pinschers and let me tell you those dogs are sharp as tacs. From wiki: The Doberman Pinscher has been used as a protection and guard dog, due to its intelligence, loyalty, and ability to physically challenge human aggressors. Doberman Pinschers are, in general, gentle, loyal, loving, and intelligent dogs. Although there is variation in temperament, a typical pet Doberman attacks only if it has been mistreated or believes that it or its family are in danger. (my own note, one pre-trained who you invest some more hands on training with your family and it, in a controlled situation with a professional trainer will even then put up with quite a bit of abuse from a child.) One or two of these babies in your house and no burgler in their right mind will want to get in when he sees their orderly behaviour which only comes from a trained dog.