I remember a stable that was like a solid arch and the staple fired into it, looked bulky and expensive iirc
http://www.tecratools.com/media/productImages/48121.jpg
Similar to the above
So you run the phone line, then every issue with it thereafter is yours in the customers eyes, leave the phones to the phone co and the alarms to the alarm co imo.
BIL has had his CCTV used in court, he fitted it himself (to a reasonable std) and has captured lots of ASB, the latest being a neighbour keying another neighbours car, I've seen the footage and it's p poor but plod have taken it to court.
Hi, providing it's installed professionally (wired under boards etc) I would pay the extra for the wired system. Wireless is good nowadays but the difference imo would be worth it and soon forgotten about when you are still buying batteries.