So far no cracking on my EPX. I am pretty sure mine is out of the second production run. I believe I remember reading somewhere on here that that initial run had the cracking problem, but they were fixed now.
To the question. I still like the Big Bully for Medium-Wet, but the new Power Drive sanded has a similar reaction for lower cost. I also use a Panic for drier, but not until I shortened the pin a bit from the original drill. Watch getting to long with the pin if you have higher ball speed. My EPX is a condition ball and does not see a lot of use, but when it works, and needs oil, it does react and hit great. I have a couple of the Actions, but on my home lanes it is so strong that it burns up. Has to do with the sythetic overlay, not the ball. On the wood lanes I rolled it on, it hooked and hit like a truck.