I just got Kenda Kwick Roller Sports. Check out the Kenda website under "commuting" tires. I went narrow- 1.25", but I'm also accustomed to bumps & holes on a really stiff roadbike, so I didn't feel the need to stay wider for comfort. They have an "iron cloak" layer that is supposed to increase durability. They're folding bead, too, so they're slightly easier to deal with than wire bead