That sucks. I hear what you are saying about the piece of mind (will they come back?) part. My wife and I were home when somebody tried to break in. It took years before we could sleep soundly at night, without waking up when the house creaked. You've already started your analysis and taken some steps to take control of the situation. Good luck with that. If it helps, here is my experience:

http://thefiringline.com/forums/showthread.php?t=367025