I'm looking to upgrade to the 915F or Fd from my 913Fd 15* w/RIP Alpha 80X. The main change I'm looking for is a touch more launch and spin when going for the green on par 5's. I can get a 250 yd carry on perfect shots, but I'm usually closer to 245 yds. I know the 915 produces higher ball speeds so that alone might get me to 250, and I like the size of the 913Fd head so I'm leaning toward the 915F, but since it's the higher launch/spin head, I wonder if I should go down to 13.5*