1> Specialized Roubiax/Apex -is it an option? The one at $1350 Should be a carbon frame. best of the 3

Cannondale Synapse vs Trek 2.1- now you are comparing apples to apples, ride each and see what feels better for you. Look at the wheels, crank and see if one offers anything "extra". 5700-105 is very nice and you will be happy. Get Compact crank pass on a triple crank (IMHO), smoother drivetrain, less chain rub, less weight...looks cooler . Enjoy