I bought a set of 30mm Specialized All Condition Elite Armadillos, to replace the 28mm Specialized All Condition Elite Armadillos I had on my Sirrus. Felt slower and heavier, so put the 28s back on! The 28s have a max press of 115-125#(recommended), while the 30s max out at 85-95#(recommended) PSI.
Didn't feel any more comfortable, just felt heavier and slower.
I like the 28s on my Sirrus, just like I like the 35s and 40s on my Crosstrail. Now, the 28s and 30s are a no go on the Crosstrail. Really feel harsh.
Completely different bikes, different tires.