Since your comfortable with the distances and already got fitted, very good players i know almost never change their irons, whatever club they use , some even use a 1980 stuffs , but they are always changing their driver. I reckon iron is a distance control, trajectory control tool, changing to a different category will definitely mess up one game especially with limited game time. take it from someone who tried change from a player cavity to a GI .. and mess up the game royal time. its the Indian not the arrow ...