Anything by directed is good stuff (
http://www.directed.com/), that includes Viper, Hornet, Python, Clifford, Avital, Valet, etc.
The latest series (known as responder LE, such as the Viper 5701, Python 872 or Clifford RSX 3.3) can be fully integrated into your trucks computer via an interface system (
www.xpressdownload.com). Advantages are a MUCH easier install plus FULL integration (probably not a big deal with the truck but for the 300 this allows for the system to ID the driver by which remote is used).
If the only integration needed is for doors, windows and remote start, can save a few bucks and still get a great system with the series just before this one such as the Viper 5900, Python 990 or 1090 (color screen) or the Clifford 50.5X or 70.5x (color screen)...