I've got a set of C24's, with about 5k on them. I'm 160lbs, I've had no real issues with them, although recently I've had to tweak the truing a little bit (I run tight tolerances). Having said that, for commuting on rough roads, I'd recommend a set of Boyd Altamonts. A little bit heavier, but a wider rim better suited to wider tires and should offer a little more durability.