DBF says that he found the higher-quality Al tubing in the CAAD10 (he has the forerunner to that series) to be a better ride than the cheap aluminum bikes. He is, however, a Cannondale fanboy. But I doubt he's as susceptible to road buzz as some people, and probably hasn't done much riding on chip-seal. I'd see if I could take the CAAD10 on some other roads if I were you.