Epic Battle and you won't be disappointed.  I know my handle is Storm4ever, but I'm thinking of changing it to Roto4ever.  The last 6 balls I have bought have been Rotos and I've bowled excellent with them.  I have an Epic Battle to drill for myself which will be my Heavy oil/tournament ball but I drilled one for my friend and there is no amount of oil this ball can't handle.  I've only seen a couple of Passions in my house and I can't get a good read off this ball because the guy who throws it has too many revs to try to tell how it would work for like my game.  Personally, I really don't like anything that Storm has out right now.  All my favorite storm balls, Ace, Depth Charge, Hot Rods are all discontinued.  My last new Storm ball was a Paradigm and I really like that ball.  For my money and yours, save $30 to $40 and get a Battle.  You won't be disappointed.