If I was upgrading I would maybe get the 128 mini.....or out of irritation the 64gb air 2. Plan to just stick to my 32gb rmini unless the storage gets too tight.
I'm about to bite the bullet and buy a 16 or 32 mini2 retina for travel. I don't want to lug around my laptop abroad, and figure the mini, at less than 300 won't be to cumbersome or a big loss if stolen or broken.