It is really going to come down to your release pattern and tempo... I've gamed a Velo+5X for a little try and it actually reduced my ball flight and inability to move draw the ball. However if I swung it long and smooth the shaft worked the best. My more natural tempo and release, a little quicker, resulted with the shaft bending at the wrong time, never recovering, thus lowering dynamic loft and my strike suffered. I now play the black shafts.
Moral to the story is it all depends on your swing. I can say that if you are a "Swinger" the blue will most likely increase your height some, if you are a "hitter" it might not work for you.