try this one:
heavy: trifecta or passion. i haven't thrown the passion but i do have a trifecta, and it is VERY strong, but at the same time controllable. it blends over under better than any ball i've owned. i often describe the reaction i get as a blue hammer on steriods x2!
bench mark even reaction: definitely go with the dark thunder. i have a friend on the regional tour and he says the storm guys out there swear by them to read lanes.
med light: i wait and see how the thunderstrucks turn out, but i'm getting alot of buzz on these as well. if you weren't fortunate to roll any of the old thunder series, then you'll be in for a treat from what i'm told. same basic reaction as the old series, just a little stronger overall now due to increasing oil loads of today.
light: tropicals or the big hits or hits.
be warned, the tropicals can be deceiving! on the right conditions, they can be very skid flippy! i think they are a little stronger than advertised.
*on a side note*: you can pick up a new trifecta on bowlingball.com for around $120, with free shipping. for that price you can't beat it. i think if you get a passion, a great ball don't get me wrong, but you already have a vertigo, and i think the passion may overlap a little. the trifecta will be earlier and stronger then your vertigo. i doubt you'll see and conditions to warrant the surface prep of 500 that the passion comes with. hope this helps! stopncrank
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STORM:If You Hear The Thunder,Sorry,The Lightning's Already Struck!