I would say no. I really like my Fire, but it is a simpler version of any of those devices. Especially since you have an iPad, the Fire won't bring much to the table for you, unless you have a ton of digital Amazon products (videos, books, music) that you're dying to have direct access to on a...
Probably not. I have Student Prime which does not include some of the features such as the free video streaming and your one free book a month. If you really want that stuff you might be offered Prime at a discount. I received an offer for 39.99 for Prime when my one free month expired (because...