Which bowling ball is better?

Ok so I have been thinking of getting a new bowling bal for a while now and I am looking at something that has a smooth arc, strong back end and can handle the heaviest conditions. I have narrowed it down to two options: the Roto Grip Rogue Cell and the Storm Virtual Gravity (or the new Storm Virtual Energy). Both are awesome but I kind of need a second opinion before I go buying a ball. Given these two choices which one would be better for me to use? Thanks!