I agree with everything said so far. However, if you're a fan of the hockey stick ball reaction associated with Storm ,(longer skid, then snap on the backend), then the Xceptions are for you. You could use the 5.0 as a benchmark, although it's a particle pearl, and build from there. The Xception would be a step down, the Rule Delta 1 a step up, all should give a look similar to the Storm masterline series.
Hope this helps,
Bill
Bowling Services Unlimited
Vise Grips Staff
wwww.bsuproshops.com