I am using Gatorskins, 700X25 and, I like them a lot. I had Michelin Pro3 on my R500, after the Conti GP4000 wore out, and the new Cannondale 10 4 had Schwalbe Lugano on when I bought it. The Luganos got a quick rock cut on the rear while I was descending a hill and had a few exciting moments, I decided to get a more durable tyre since I am not a racer in any way every thing I read about the Gatorskins said it would be a good choice and it definitely is, the extra width and volume made a big difference on the rough rural roads I ride every day. The Gatorskin can be expensive (all Conti seem to be a bit pricey) but I shopped around and found them at Ribble for $31.00 if I spent over $50.00, shipping from the UK was only $8.00. I will keep the price above in mind too. I try to keep a spare folding one handy as well as buying Conti tubes from Amazon (an Amazon resale I think) in a 4 pack. I'm sticking with the Continental tyres, maybe a set of GP4000 for the wheelset I have in mind for the days I want something kind of sporty.

Bill