I just changed to the 'black Chilli' 4000S 700x23C, and very happy with the grip - even in the wet - and puncture resistance. I ride rural and city roads, quite a bit of debris, and no punctures as yet (300 miles). The all black tire doesn't look as good as the old white sidewalls I had, but it's a great trade off for improved ride and puncture rsistance. I'm 81kgs, run 110psi in the front and 115psi in the back.