You have to check out Astro-Flex. They have been around for a long time. The best features of any system I have seen. I have been using mine since 98 and the remote just quit working a few months ago. Got a new remote and it works like new. I use this to start my truck every time and I have 160,000 miles on it. Every installer I have talked to loves the Astro-Flex. It works with Automatic or Standard transmissions. The Standard transmissions uses three lazers to make sure the transmission is in neutral before starting.
I really like the remote. Six buttons that control the start, shut down, door lock/alarm, door unlock/ disarm, panic, and one aux. Plus you can use a combination of two for adding two more aux. , setting the run time, using the find ( lights flash and horn sounds, setting the temputure. It will start when it gets to a preset degree and warm itself up.
The only downfall is it should be installed by a dealer. It has a lot of things that need to be hooked up and takes a while. Make sure someone does it that knows the system, First timers hate it till they do at least 3 then they actuly love it.