Since I no longer have a garage to park my car in, I am considering a security car alarm. There have been many car thefts and break-ins in the area I moved into.. such as 3 adjacent neighbors (great). After reading many threads and doing some internet searches I have a few questions. Two local installers do security systems and audio installs. I talked to them both with questions about my Kenwood stereo install, and didn't feel they were qualified to do the LS - so I did it myself. They didn't know about the RAP feature and neither place had installed a stereo in the LS (AudioExpress and 2 Best Buys). So I don't want them to install a security system. Many LVC threads mentioned not installing a security system yourself, especially if it's a first time installing a security system (let alone on a LS). I called the Lincoln Dealership I use and they suggested their Ford Custom Shop to do the install, as they do many LS's. I talked to them and they suggested a Viper 350 Plus 1-Way for $199 or 2-Way for $299 installed (or a Viper Remote Start system for $599). I want security and am not concerned about or wanting a remote start (although living in Arizona with the car always sitting outside now that remote start might be nice, but not needed). I see a Viper Responder 350 2-way on Amazon for $105 shipped. It would cost nearly $200 more to buy it and have it installed from the Ford Custom Shop. For $300, would you get a better Viper system and install it yourself... or let the local Ford Custom Shop install the Viper 350 Plus 1-way for $199 or 2-way for $299? (Or install the Viper 350 Plus 1-way or 2-way yourself). Also, do they need to get into the dash/stereo area to install this? (I don't want them in there as I just completed my stereo install and don't want them messing around in that area). Right now I am considering letting them install the Viper 350 Plus 1-way for $199.