Are you going to sell the cosmos? I'm on Mavic SLs now, which I like just fine, but if I bought wheels for faster cruising, i think I'd go deeper and get some 404s and hang onto to the Mavics for training and windy days. Or I'd go the other way and get some really light Elans. The Vigors may be better (or not) than the SL, but I couldn't see owning both.
__________________
“Courage is going from failure to failure without losing enthusiasm." (Churchill)
"I am a courageous cyclist." (SpongeDad)