My previous driver was 425 head size from 2005 and I just switch to the 915 D3 in the beginning of summer. It took me a long while (obviously) to see something better. I love the feel, sound, and the more distance I get from the 915. This is my first Titleist driver and so I can't compare it from its previous models, but I am hearing that the 915s are much more forgiving than the previous. Also, my ball spin is lower with the 915. .... I tried to look for the 915 Driver Story thread, but I couldn't find it- if you do happen to see it, there are plenty of positive feedback on it about the 915 driver. In any case, see if you can get a fitting for it.