I just got Michelin City tires, 700x32C for $7.99 each. Bomb-proof commuter tires, especially with Slime tire liners. Forte Gothams are also nice for commuting, if durability and puncture-proofedness is your concern. They weigh a ton, but hey, I'm not racing.
EDIT: Performance now has them on closeout at $6.99.
Last edited by RT; 05-21-10 at 05:57 PM.