I've got 28mm Gatorskins on my commuter. After 7400 miles, I've had one flat. That was caused by a goathead through the sidewall. The ride is great, but they feel really slippery in the rain.
A friend who commutes loves his new Marathons. He says they feel more "solid" than the factory Kendas they replaced.

115psi and getting pinch flats? Just out of curiosity, spectastic, how rough are you on your equipment as you ride? Are you sure they are pinch flats, and not caused by something else? My friend was getting tons of flats and we couldn't figure out why. I suspect it was the plastic rim strip or a burr on the inside of the rim. Some of his flats were caused by improper mounting. He was pinching the tube under the bead. I had to show him how to inspect the bead area before fully inflating the tire.