I have about $10,000 ready to be dumped into a Whipple or Roush supercharger setup for my 2013 GT. The dilemma? The 2015 right around the corner. I've been through this before when I bought my 2010 with 2011 5.0's right around the corner. If only Ford could give us a little more info about the 2015. Surely my 2013 with a Whipple should "Whip" a 2015. I just dont want to be that guy says, "damn, I should have waited." So the waiting game begins........