Go with what works right? We have been installing and servicing NEC/Nitsuko key systems from the beginning of our company. We continue to use these key systems. In our market segment NEC provides us and the customer two key things: Price and Quality. Paired with one of the best surge protection on the planet how could you go wrong? Lets face it Southwest Missouri has some pretty nasty lightning storms. With that comes expensive electronics repair. That is why we use Panamax surge arrestors. No return trips for damaged electronics=lower operating cost.