Sorry to hear of the theft, I know there will be stuff you can't replace ~ pics, letters, essays etc. If you buy a cheapish external hard drive you can every now and again back everything up on to it! Not much help now I know but you won't lose everything again! You can also back up pics onto discs, my boss prefers the external hard drive! bought after the boys released a virus onto his pc! Now 1 a week he brings it downstairs and updates it!
As I said not much help but a future reference.
They will catch the ******* that did it, maybe not for your burglary but they will get them!
Glad no one was hurt though! For that at least you can be grateful.