I've had excellent luck with Continental Gatorskins with folding beads. A bit lighter; very nice if you ever want to take an extra tire with you on long rides or tours; easier to store if you want to keep them around as spares when you are done using them.

And -- even though you didn't ask -- now would be an excellent time to consider changing to 25c's; if you ride on chipseal much or are a larger rider (like me) I think you might enjoy the extra volume.