I'd say the HyRoad would be a better fit for what you bowl on right now, but if you plan on going to some tournaments or bowling in other houses with different shots, the Red Zone would be the better choice. They're both an upgrade over the Power Grooves (which are still great for lighter oil conditions if you can get them to carry the corners) so you can't really go wrong.
As always, consult with your local pro shop operator and have him watch you throw a few balls with the Power Groove, he may be able to suggest a completely different ball and the drilling to go with it.
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