I have the
Viper 1002 1-Way system on my Sat. I'm pretty happy with it, though the shock sensor is super sensitive to noise or touch. The system was around $300, I just needed something with a basic starter kill. Since it is a one way if, for whatever reason I'm out of earshot from it, the car will activate a different disarming code (four beeps instead of two) to let you know "Hey, check for door dents" or whatever else happens out there. Good product in my opinion.
Again, this is my Saturn. I didn't need the 2-Way Remote. I can say that the two-ways do have great range, 1/4 mile I think. For the Zee I'll be looking into the
Viper 5901. The fob isn't the fanciest but I like the "Door Open" feature.
Happy Hunting!