Loving my redrilled Rhino Pro Purple.  Gets down lane long and NEVER overreads the oil (down and in show down 2nd arrow).

Was wondering what other balls are similar to this one in case it cracks??

What is your ball speed and rev rate (stroker, tweener, or cranker)?  Just those two things will help greatly.  However; the Rhino Pro came out almost 30 years ago.  If you have pretty slow ball speed but decent rev rate, I would lean toward a Twist.  If you have average ball speed and average rev rate, look at the new Rhino.  If you have little faster ball speed and not a lot of rev rate, look more in to a Igniter.  I think the only way you go into anything stronger while staying around second arrow, like a Knock Out, is if your are at 20+ MPH.