I've owned the iPad 1, iPad 2 and iPad Mini... I currently don't have an iPad...
I'm going to buy either the iPad Mini 2 or the iPad 5..
My purchase will be decided mainly on comfort and capacity, if the iPad mini (not bothered about retina) is the same weight and with a 128GB option, I'll but that...
If the heavier, then I will just buy the iPad 5.
If it's not going to be light and comfortable to hold, I'll just buy the full iPad.
I suspect that Apple will hold out on iPad mini specs, they like to drip-feed tech on new product lines.