[USA in a Chevrolet]

I have had a Pressure Pro Tire monitoring system for 5 & a half years. I am looking from opinions from people who have owned BOTH Pressure Pro & Doran 360 systems to see if they recommend one over the other. The reason that I am thinking of changing systems is twofold. First my batteries are over five years old & will probably need to be replaced soon. Second, I traded in my 2500HD SRW Chevy for a 3500HD Dually so I need 2 more monitors. By buying 2 more monitors & replacing the existing monitors, I'll be spending a good portion of the cost of buying a new system. My Pressure Pro is the older model & I can update the monitor to a new model for $100. Or I can buy the Doran system. My only complaint with the Pressure Pro is that the tire pressure sensors will leak air eventually if you do not change out the seals occasionally. Pressure Pro says that they have changed the seals to a new rubber thsat does not leak. So, if you have both products, which do you recommend?