Andy - If you do not have a roller furler, I have found the class 163% to be a better sail and worth the penalty under PHRF. The sheeting angles of the boat are designed around the 163 not 150-155. The boat points higher and is faster. My 2cts. Also there will be more used 163% available that are good racing sails since they are the class sail. Just a suggestion.
David
#397