I want to keep some width to the tires but something more for long distant road rides and still have my fast days.
Assuming you have a rim that can handle the stress - go get a 1.5 inch tire with a
continuous center-tread pattern, a heavy duty tube, some beefy new rim tape and pump the sucker up to 100psi. (for the back wheel)
Use the same thing up front with a lighter tube and less pressure.