Congratulations on your admits! I would say of the three programs, IE has the best reputation both in the US and outside of the US. That said, the Spanish economy is in bad shape and your fears of unemployment are valid. Likely the same for the UK (though perhaps to a lesser extent). Obviously this comes down to a very personal decision, but you should also consider that as an international student, getting hired in another country after school can also be more difficult because of Visa issues, etc. It really depends what you're looking for, but I can just say that IE is definitely the best program from this list.
Best of luck,
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