I am looking at buying a set of AP2 irons. Im 17 and consistently shoot in the mid-high 70's. My driver swing speed is about 100. I'm wondering which shaft is best for me. Basically it's between DG s300, KBS Tour stiff and Project X 5.5 or 6.0. I prefer feel and workability more than anything and I like a lower trajectory with a decent amount of spin. Thanks for any help.