Originally Posted by
ColinL
This is intuitive, but my 25mm Continental GP 4 Seasons completely disagree with you. This is one of the toughest tires made, yet it rides great and soaks up bumps like few other tires its size. (It rolls like wet mud, though.

)
However, it's also one of the most costly tires you can buy. Cost is likely the reason the Gatorskin rides a lot worse than the GP 4 Season.
GP 4 seasons can be had for $45 each plus modest shipping from Wiggle. Still not cheap, but better by far than you can do locally.