Another vote cast for GKs! I haven't tried the 26 yet but I've got three in other sizes and love them. Maybe not quite as flat-proof as a PT but the only flats I've gotten on my 32s after a year of commutes and club rides are snakebites caused from playing around with air pressure. I've also never, not once, gotten a flat from a PT and I've had several of those, so the comparison really comes down to ride quality. GKs are more supple, feel faster, and really glide over everything. The file tread also looks much classier, in my opinion.