I have a viper 5901 and a valet 561. The viper is great because it has a mile range and has a screen that lets you know if your alarm is going off and you can see, on the screen, if the car is started. But I rarely drive my car and it quickly drains the battery if it's not a daily driver. I removed it and reinstalled my valet 561 because it doesn't drain the battery. But.....you need to be able to see or hear your car to know if it's actually started or not. It does not provide any security but it is cheap and reliable (have had it for 7 years without issue). Also, add an immobilizer bypass to your budget because you will need it.
