If it's windy, as it often is in West Texas, I like the TP5X.
In calmer conditions, the Tour Preferred X is my go to ball.
For me it is the TP5x. I find that my distance and control, especially in the wind, is much better with the TP5x than any other ball I have played. I do opt for the Project(a) when the weather is colder, and I love the spin that I can get that ball.
TP5 here. I get better accuracy, green side spin, and feels great off the putter head.