I used the RX again and I am thinking that this could possibly be the ball for me. I don't have the SS that I did at the beginning of the year so I am hovering around 105 with my driver and this ball just feels wonderful off the tee. The ZStarX was going great for me when I was swinging a little harder. I keep going back and forth on this I know, but I am also learning more about golf every day.