I have both and like both. I drilled the Infinite Theory first, and think the ball is just awesome. I liked it so much I drilled the Theory, same layout. I haven't gotten to throw the Theory much, as the house I bowl in changed their pattern right at that time, and they are now using less oil.
I think the Infinite would be the way to go, drill it strong, and don't be afraid to put a little surface on the ball for use on some oil.
Mike Austin's Bowling Dynamix Pro Shop
Houston, TX
I'm back doing what I love and couldn't be happier!!!