Security policy - Round table discussions

What role do / should consultants play in the security technology buying decision?

There's no doubt that the security technology buying decision is a complex one. There are several factors to consider, and no one application will have the same exact needs as another.  This is generally where security consultants come in - to help out with the security buying process and help the end-user decide on the best technology to suit their specific needs. But more specifically, what is their exact role in the security technology buying decision? Let's take a l...