I'm getting fitted for new 712's this weekend and am curious about all the shaft options these days. I'll be going to a Titleist Advanced Fitter w/ Launch Monitor so I should be in good hands. But as an 8 handicap with only average ball striking will I really notice that much difference between all of the shaft brands out there, stepless, etc? I understand flex is important, but there seems to be dozens of iron shaft options out there. Thoughts?