Here is what I ride - 650B X 42 Grand Bois Hetre You would be hard pressed to convince me of a better touring tire. I have about 2,000 miles on my set.
Just got home from our 2nd annual Owyhee Scenic Byway ride - 104 miles on dirt & gravel roads on a fully loaded bike, they perform like a champ. One of our fellow riders commented that
he thinks he should trade out his Schwalbe Marathon Mondials as I was rolling faster than he was (nah, I just have stronger legs, hee hee) Anyway I would certainly recommend them
if they will fit your fork and brakes. I do run them with a "Mr Tuffy" style liner as we have so many goathead thorns here but I don't notice that slowing me down.