Not to discredit the two balls you mentioned. But you may want to look at the Pivot by Ebonite. It comes out of the box at 1500. At box finish, it is great on fresh heavy patterns when playing straighter up the outside; not so much when you have to get deeper. However, with a touch of polish, it becomes much more versatile and still can be used on medium to heavy patterns and yet still retain enough energy to play a little deeper on the lane and still carry out the corner pins.
Is your 16 mph ball speed at the pins or at release? Reason I ask is because with a almost 400 rev rate, it can make a difference as to what ball to recommend as well.
I used to throw it faster (and still may from time to time), but for now let us say it is 16mph off hand and 14mph at the pins, since this is about heavy oil conditions.
With you being pretty rev dominate, if you use something with a high differential, you are going to need to do a pin below the fingers to cut down on the flare if you are going to have a weight hole. If I was drilling the ball (which I am not obviously), I would probably do a pin up with no weight hole and use surface to dictate length.
There are quite a few options ball wise you could go with for what you are looking for. Brunswick Mastermind, Ebonite Pivot, Columbia Take Down, and even the new Columbia Disorder coming out. With your PAP, you could do a pin over ring finger which should put the pin around 4.75 to 5 inches from your axis and stack the cg underneath. The Pivot at box surface will best be used playing straighter on the fresh heavier patterns whereas the Take Down and Disorder will be more versatile in that you could use them both playing straighter as well as being able to play farther inside and still get some recovery. The Pivot would need to be taken up to 3000 abralon in order for it to be more effective from inside angles. I have not seen enough of the Zero Gravity to really make a determination on that ball.
