Their carbon bikes are a force to be reckoned with, but nobody knows aluminium quite as well as Cannondale.
The CAADX is their cyclocross model, equally adept at weekend racing or weekday commuting. The short chainstays make for nippy handling, and the carbon forks provide a decent amount of comfort. And the alloy frame is both light and crisply responsive, making for a lively ride without undue harshness.