Well what you’re going to want is a Clifford product. They make both the viper and the matrix, plus they have a new G5. I have no experience with the G5 but I do know the matrix is top of the line. Get a prox sensor or two and you’ll be fine. The object of today’s after market alarms inset to warn the owner as much as it is to deter people. I have 4 sirens in mine 2 directly under my dash next to the alarm box. Why? Because it’s so loud your ears would probably bleed before you can finish cutting all the wires. And typically if you call your insurance they’ll lower your rates a little if you have one. The matrix has your gps, you can call in and see were it is. If you loan it to someone you can even see what speeds they were going. It also pages you or calls your cell if it goes off. You can typically find the units cheap. Its just having them installed that’s pricey.