Bontrager Race Lite 700x28 on the rear with a Race Lite Hardcase 700x25 on the front, both kept at 120 psi at all times. Previously I had 6 flats between my two Race X Lite 700x25 tires before upgrading. Since I changed the tires, my experience has been zero flats, which is a good thing since the hardcase tires in particular are a pain to install.
Weight: ~220 pounds