Want one that could last a lifetime?....Try out Stronglight's A9 or Delta needle bearing headsets. Super light and super strong, plus hardly ever needs adjusting once the races are "bedded in". Plus, the steel races are replaceable if they do wear out (they usually go for just 5 to 7 bucks for a set). Pretty much one of the best components that the French ever designed for bicycles.......actually, one of the best designed bicycle components ever ...... Miche (Primato model) makes a copy of the A9 that is also less expensive and should work just as well.

The Stronglight "Deltas" are two on the second row, which I think will look better on a Cannondale because of their more modern shape.
The Miche "Primato" version is the middle one at the back row
JMOs

Chombi