Like Bruce i didn't mind the Commander 2 tyres on my Street Glide, but have had a few sets of American Elites. The most crucial factor with these heavy tourers is to be all over the cold tyre pressures.
I agree, I run 40 in both on the road king, makes the steering a bit lighter. I actually started putting 40 in the front after watching a vid by jerry palladino, the riding instructor from the states.. also got great mileage from both tyres.