Welcome!
I have the Transformer Prime, and previously, the Galaxy Tab 10.1. The Prime is leaps and bounds better than the 10.1. I would never buy that tablet again, at any price. It seems you're definitely committed to that size, so no 7" I presume? Of your choices, the T300f is a great choice once it is released. Nice thing about it, is aside from a slightly worse screen than the Prime, it comes in a few different colors which your lady might like. The keyboard dock is optional but really makes it a slick device. Good luck!
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