I bought a set of Specialized All Condition Armadillo Elites as an experiment. 700X30. They were for a very good price, so I didn't get hurt too bad! They run at quite a bit higher pressure than the Supremes ---- but ----
They feel heavy and slow. I'm going back to Schwalbe Marathon Supremes - not soon enuf! The only downside of the Supremes is that they hate snow and ice!
Sometimes, I don't know why I keep experimenting!