Thanks to everyone who posted comments. I realize that it isn't a cut and dried issue of fault. I was upset at the prospect of shelling out a few hundred additional dollars when I was thinking I had resolved my issues by buying the Dura Ace in the first place. I certainly see all of the issues that you all have put forth. I will go in with an open mind and do everything I can to maintain a good relationship. I feel better about the situation.
Thanks again!
Mike