I would go with a Dimension.  In my experience with them, it's a little rollier than the Virtual and has more of an even backend reaction.  The virtual, at least in my opinion, is a lot poppier on the backend.  For going mostly down and in/straighter I would say the Dimension.  They are both amazing balls so you really can't go wrong with either.  I would say the Virtual is still stronger no matter what but the Dimension is quite beastly in its own right.
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