I'm running a pair of Panaracer Pasela Tourguard tires at 630X32. I happen to have an old 27-inch pair of wheels, but the tire also comes in 700C, so no worries there. I've only had them for probably less than 500 miles and have nothing to really compare them too as far as road tires go, but the only flat I've had was a pinch-flat due to underinflation so far. Just last week I dug two chunks of glass out of the front tire. They had sliced right through the tread, but stopped dead at the Kevlar belt. The rubber also seems nice and sticky, and they don't feel heavy to me. Of course, my bike weighs about 30 lbs clean with my lock onboard, and more with panniers, so I may just not be noticing!