I'm currently playing the ap2's with project x 5.5. I'm hitting my 7 iron 150 and was looking to get a little more distance out of my clubs. My swing speed ranges between 75-80 with a 5 iron. I'm looking to switch shafts to a flighted project x. I like the project x 95 flighted. Should I go with a 5.5 stiff or a 5.0 reg ?