I've had my sights on a Cervlo S2 Ultegra for some time now, I haven't test ridden a CAAD but have heard great recommendations from friends since if I crash it in a crit it won't hurt me as bad as crashing an S2. I plan to get on one soon, but I do love the fact that if I get a CAAD I will have some freed up budget for a new set of wheels!