Just bought a Beat'n.  It depends on what you're looking for really, something that'll pick up in the midlane (Secret Agent), or something that go a little longer with a strong backend (Beat'n).

Go with The Break and forget about both of those choices, i have all 3 the break is better all around ball. Even the Rival is a better choice if you want something ebonite made if you want storm made the break is the choice.

Out of the two, I would go with the Beat'n

I have the Beat'n and it's the strongest hooking ball that I have in my arsenal.  It goes long then make a hard turn at the breakpoint.
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Ken - aka "dpunky" - Certified USBC Level I Coach

"Now rolling Hammer and Storm"
Too Cool for School

Do consider 900G's The Break...it will give you a great mix of both balls, have a strong move in the back, and does not have the so-called "more simple" HART layout system, that has proved, time and again, to be a problem for all but the most exact and professional drillers. The Beat'n and the original No Mercy have been, in my experience, good for some, and bad for others. It really depends on the layout, and it won't be as versatile as the Secret or Break. But between the Break and the Secret, you have one ball that is definitely a WOW ball and one ball that is just like every other...but still, that WOW ball is also versatile, takes cover changes well, etc.

Go with the Break.