ProV1 or ProV1x

I had switched from the ProV1 to the X this year. But, I just played my best round in well over a year with the 2013 ProV1, and I absolutely loved the ball. 

The titleist v1 and x are really the ONLY balls, and you really can't go wrong with either one, they both go far, but its either that little bit softer feel, or that little bit longer distance.
Put simply, nothing matters but the score, and you will get great performance with both, so I would use the one you score the best with.

I can't tell a difference between the V1 and the V1x. They feel the same to me. The distance is about the same as well. But the furthest drive I ever hit was with the V1. They're both outstanding balls.

I've been playing some decent golf, so I rewarded myself with a new sleeve of Pro V1's today :)

I love the Pro V1s.   I hit my approach shot under some pines into some pine straw beside the #1 green.  I knew if I grounded my club, the pine needles would move my ball, but knowing it was a brand new Pro V1, I felt confident I could hit out without grounding my club.  I chipped about 18" off the green and the ball stopped 4' from the hole ... 1 putt for a Par save :)

Great round, I played my first round with the 2013 pro1x today with my new clubs that I have been dialing in distances at the range.  

Sort of a waste of time at the range though, the ball goes farther than range balls. The feel and control I think has improved when closer to the green.