Hmm...I wonder if you could reverse "Orb" to your phone. It would be lovely to find pictures of them flaunting their loot and waving their gun...then maybe even move over some files
That's odd that they didn't wait for you to be gone before they broke in, and also that they left the bag with your laptop and 360. They are dumb enough to do it the first time, and they are dumb enough to come back for another helping. It's nothing new - criminals often do return to the scene.
Good idea on stocking up on heavy weaponry. In the meantime get some PepperSpray and a couple stun guns as you will be less likely to hesitate zapping and spraying even if they are a couple of kids. If they have a gun (and in your home), and you feel the need to shoot them...make sure it's fatal. Otherwise you set yourself up for a lawsuit.
Happy hunting...