Armadillos rule. I have had the same pair on my commuter/single speed for about 3 years (short commute and not a lot of other time to ride). They're heavy but I haven't had a single flat in all that time. They're recommended to run at 80psi but I usually run them at 100psi for a little extra speed and a little less risk of pinch flats (6'2" 235lbs). I'm in Boston so the roads are a mess and there's glass everywhere. There are places in the tire where glass has cut up the rubber but the casing is still fine. I highly recommend them. I had the gator skins on my bike for a while and had really bad luck with them. Replaced them with the armadillos after a couple months.