One other to remember...if you are bowling on a lot of oil or longer pattern, you do not want something with a big back end. You want something that is smoother. If you get something with a big back end, generally they will be cleaner to create more back end. So, if you have something cleaner or with a big back end, it could lead to over under, due to itself fighting itself.
You can get a ball that will be continual or one that will read the mid lanes and be responsive in the back end on oil or longer patterns, but I would not recommend something per sey with a big back end. As well as back end is created by rotation and a proper release. Bowling balls only enhance what the bowler creates.
Go with a Virtual Gravity as it will fit with the other 2 and be different. Also use a layout that will have a pin slightly farther away from your PAP with a stronger mass bias, close to 45 degrees to keep it continual in the back part of the lane.
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Formerly BrunsRico