How to work with a calibrator?

I would like to have my plasma calibrated. For the most part the picture is already to my liking which means a relatively high contrast settings. But I know a good calibrator could bring out more detail and eliminate some of the black crush I see.

In our phone discussion, he seemed very inflexible about calibrating it to anything else but the 6500 standard regardless about what I wanted. He angrily described other experiences with customers where he was paid for his work and they wanted to change settings. Frankly, I'm shocked. Why can't the end product be a combination of the customer's desire and the calibrator's expertise?

That's encouraging. Here is where I'm coming from: I think I have a decent picture but know there can be some improvements. I demo'd a VP50 yesterday and immediately noticed that my TV has some black crush and missing some detail. The VP50 showed me that improvements are possible. While I have never seen a calibrated plasma, I have tried some of the settings detailed in various threads. To me, those settings seem very dark and soft on my set and I won't be able to get used to such a dark picture. I'm having a calibrator come out next week to my view my set. What I would really like to say to the calibrator is do your magic. Make the whites really white and bring back the shadow detail but give me the contrast and detail I like. But based on his attitude on the phone I'm not sure he is willing to work with me. We'll see and maybe this is much easier than I think.