nun, I'm curious, how much realistically do you think you will reduce the wheelset weight by? Off the top of my head, wouldnt the reduction be such a small amount that the diff of your total bike/you/stuff weight may not be worth the money spent? I'm thinking that as you will not want to overdo the lightness because of the inconvenience of getting into spoke problems, don't you think that you may only bring the combined two wheel weight down by a pound or so?

Assuming it is for your Cervelo, you have ridden it enough as it is to know how it feels with your setup, I just wonder how many hundreds of dollars it will cost to get a wheelset that much lighter than these ones without getting into reliability issues. Am I wrong but aren't we talking of about probably min. $500?

I certainly dont have suggestions for you, but just thinking out loud here.