I was hoping for at least a 256 option on the Pro, that didn't happen, so I purchased a 128. However, if both had been released in the fall, I would have purchased a 256 for sure. I would prob most likely have purchased a 9.7.
I currently use my iPad air 2 daily, and use my Pro for all the pencil needs as it is not as convenient to carry around like the air is. The 9.7 Pro is probably the ideal device for me, but having purchased a pro in October it is hard to make another purchase of this amount, even if I cycle down my current air to my wife to replace her older iPad.
