I'm voting Claire Elizabeth :) I've just never been big on Lauren, and Olivia and Sophia are so popular right now.
Claire Elizabeth was one of my favorites for my DD, but DH vetoed it because we know too many Elizabeth's. That's my vote! Good luck! FWIW, if you have a few top contenders, you will probably just know when you see DD. I didn't necessarily believe that, but it was definitely true in our case.