Check out Brunswick Power Groove,Dynothane Vendetta or Ebonite's Prime Time line of balls.These are all mid to low price range balls with proven cover stocks.A general rule of thumb for these covers is Pearl-skid snap,Reactive-arc and particle-early roll hook.All three lines have at least one ball in each catagory.The cores are basic and time proven.At this point in your game exotic drills,covers and cores won't help your game enough to justify the expense.
The Double Helix is a Urethane ball with a reactive center stripe.The idea was the control of Urethane with the hit of reactive when it flipped to the reactive stripe.If your like 90% of the bowlers out there the ball will roll mostly in the urethane area and VERY little of the reactive area comes into play.I don't think you have truly thrown a reactive ball yet.
If I were to recommend one ball to give you the added hook of reactive plus control it would be the Power Groove Pearl.The cover is PowerKoil 17.This is a durable controllable cover.The weight pucks in the core will allow your driller a little more creativity in drill selection.
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President and CEO Visionite Stormy Buzzwick LTD