I have always run period correct Continentals. They perform reasonably well, but I don't ride real hard. One issue is their performance on freeways with rain grooves, the bike shimmies around quite a bit. A little disconcerting, but I never feel like there's any real loss on control. Might be more a function of the tire size (3.25-19 front and 4.00-18 rear), than design. I'd like to hear from others who are running a different tire. Perhaps the shimmy is unavoidable??