I think you should stick with the ProV1x, DB9. It's long off the tee and does all the rest without having to constantly switch balls.
Hey pulp, I do agree with you it may be easier to just go with a great ball and play the ProV1x the whole way through. I tend to like to tinker so that is what brings the whole dilemma. In the past I've played a distance ball off of the tee, ProV1x on approaches and ProV for short game and putting. So yes maybe better to focus on my game with the one ball for sure.