My first long tour included riding on hundreds of miles of varied pavement with a lot of tarred surface cracks.
Each tarred over crack stuck up above the normal road surface. I was very glad I had 2" mb tires on rather than
my usual 32's because I was carrying 50 lbs of gear. I don't remember the brand name, but they had a narrow
solid center which helped me attain my highest touring average of 85 miles a day on tours of over 1000 miles,
so I don't think using wide tires designed for pavement use as well as off road are going to slow you down that much.