I rode the felt and it seemed to be pretty nice. They claim it to be 16.5 lbs and it has Dura-Ace components with an FSA carbon crank and Velomax Circuits I think. My litespeed has cosmos, full Ultegra, and is around 18lbs.
One advantage with the Felt was that is seemed a good bit stiffer. Then again, over 60 miles that may turn to a negative.