K7JBQ:
The thing to look for is the ball that best matches your clubs. What you want is consistent performance.
K7 absolutely right with this, but I would also add your style of play. Some folks like to let the ball roll out, some like to stop it dead, and others fall somewhere in between.
I like to control my distance and placement as much as possible, so I make the odds of having an inadvertant kick from terrain get me in trouble as low as possible. Becasue of this I play balls with a higher spin rate and control the ball run out, but it comes at the cost of yardage on each club.
Just remember that no ball is going to be an instant stroke saver, no matter which one you pick to try you have to get a adjusted to the swing rate and only then can you begin to honestly evaluate if it fits your game or not.