"Even though we provide a highly-technical and complex solution, we find our prospects and even our most knowledgeable customers are forcing us to compete as a commodity with severe pricing pressures and relentless negotiating." I keep hearing, "your price is too high."
Let's face it, the more complex the situation becomes, the more people try to simplify things and the simplest denominator is price. In negotiating, knowledge is strength. Build a knowledge bridge from your customer's critical issues to the added values of your solution. You'll be able to negotiate with your customer on a financial level that will all but eliminate pricing pressures.