As far as the motion detectors are concerned make sure you request the Pro versions! the model number is PMS01 the regular MS10a's are well junk you just get to many false alarms in the mode 1 and mode 2 (2 movements) just flat out doesn't work reliably. What I suggest is request the Pro units and set it to mode 2 test it thoroughly and you shouldn't get any false alarms! Also make sure you get the large power horns these thing are really nice, and extremely loud!!! Which is what you want I had two in the room with my new stereo and when I had a break in they let immediately you should try to get the three for one deal that x10 advertises from time to time. One last thing that I feel drove the thieves out of my house and that was the flashing lights, all my lights are x10 controlled and this happen at night my neighbor said that my house looked like it was alive!! and I can tell you it looks impressive so at the very least if you have a private home at least setup your porch lights and one interior light you'll be impressed how it looks at night! Hope this helps
Tcj