Does anyone know if Apple is able to upgrade your iPad replacement through AppleCare for an up-charge of the difference? (For example, coming in with my 16gb iPad and paying the difference to get a 32gb 4G LTE version). Seem a little farfetched, but I've heard of warranties offered by other retailers claiming if there's ever a need to warrant the item, that they give you a "gift card" of the value of your purchase to go towards a new item (Something along the lines of a CompUSA employee told me once about another electronic item). Just a thought. Thanks!