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You should go play with these devices and see which one fits you better? You'll have an endless debate over which platform OTHER people prefer by asking such questions.
while this is often true, thus far the bulk of replies on this thread tend to focus on what it will be used for and not personal preference. Optimus, since you say it is primarily for work, I would lean toward the Ipad or another tablet if you have the coin. I love my Fire but it really is geared more toward entertainment.