In reply to Howardw1968:
> Schwalbe marathon I have them on both my bikes (commute and tourer) and my wife's bike
I've not used the plain Marathons, but the Schwalbe Marathon Plus are quite amazing. I recently put my old pair back on my CX bike for summer and realised there is nothing wrong them. They are 6 years old, have done around 10,000 kms and have never punctured. Pricey and heavy, but considering how fast I seem to go through light tires on my road bike they have to work out good value by the km and after a couple of years of not puncturing commuting, I stopped carrying a spare tube and pump when going to work and back which probably balances out the weight thing.
I've now got Marathon Plus Tours (same except a more pronounced tread, good for gravel road and off road bikepacking) and Marathon Winter (studded), because I'm so impressed with basic Marathon Plus.