If you are going to spend money, buy one that gives you pressure and temperature on all tires and alerts you if one changes. I think it is one of those safety features that is a necessity. People seem to spend a whole bunch of money on things like solar systems. A solar system won't save your life. A TPMS system might. If you search in this forum for TPMS there are several threads that discuss the different kinds and why each one is better. Your choice on which one, but I would definitely get one. I have Tire Minders and like the system. I am sure that several others out there are just as good.
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