Nice wheels but expensive and you have to ask yourself, do you really need them. They are the same concept as the Zipp Firecrest and the benefits of these wheels are really handiling in a cross wind (so primarily you are talking about the front wheel and being able to have better handling on the front in a cross wind at the same depth or being able to go a little deeper on the front). They are not a "faster" wheel.
So how often are you racing and fighting a strong crosswind? If you are racing crits, that cross wind advantage is not really there. Even in most road races, you hide in a pack.
Beyond that, I have used Edge/Enve wheels for years and love them. Strong, stiff and sturdy and their customer service and replacement policies are very good.