I currently game the Pro V1x but I've experimented around with the new Taylormade Penta TP ball. My swing speed is around 112 and my driver carry is around 280. Which one would be the better choice according to my specs. (No company biases please). PM me if you want more specifications info.
I'm not going to tell you which to play, but would encourage you to go through our Ball fitting Education and Selection information at http://www.titleist.com/ballfitting
You'll learn how to evaluate which golf ball is best for your game and which will help you score better.