Your experience is exactly the same as mine. I've gone with Panasonic Ribmo. I'm currently riding 32mm tires. 28mm set is on the way. I've had one flat in the year and a half of riding them. I put a Mr. Tuffy liner in the rear because something punched a good sized hole in it. The story I have on Ribmo is that the government of Japan sponsored a design competition to develop a superior tire for the Japanese commuter. I find the best price on Amazon, usually via Niagara Cycle Works. I'm now a repeat customer of the Ribmo.