Having spent a number of years in security R&D I have to strongly recomend against wireless systems if you're really concerned about property loss. A low end, hard wired system will be pretty bullet proof as long as it's installed corrrectly. Stay away from glass break detectors. if motion detectors are used, don't skimp on them. A good dual detector will keep you from having to run there for false alarms. If you want the best, as NCPartolAR said, check out Sonitrol. They have the highest on scene arrest rate in the industry. In all fairness, I did work for Sonitrol in the R&D area but haven't been with them in many years now. I still feel they are the best bang for your buck. If you just want to have a simple, reliable, call your cell then let me know and I can try and help you out in email instead of clogging up the board and also not giving away your security plans.
FFF