For the past several months, I have been running Continental Grand Prix 4000s. These are by far the best road tires I have ever used. My past tires include the Vittoria Open Corsas, Vredestein Fortezza Tri Comp, Michelins, and other higher end tires. The 4000s blows them all away! The ride is as comfortable as the Vittorias which seem to be the benchmark for comfort. However, my experience with the Vittorias has been that they wear quickly. I got as little as 600 to 800 miles out of a set of those. They are very fast tires, and they corner extremely well. And tonight, I tested them in monsoon like conditions and they did great. I have gotten about twice as many miles out of these than expected based on my previous experiences with the Vittoria and Vredestein. Plus, I've ridden these over gravel sections and never even cut the tread. I've never flatted with these either. So, if anyone is looking for a new road tire, I definitely recommend the 4000s. The "s" designation is important, as Continental also makes a GP 4000 as well.