check out the currency converter and take it from there :
we generally change a few $100 at our local currency exchange - better rates than banks and airport .
once overseas we use a credit card . while it costs a little in transaction fees , it's simply more convenient .
you can even get a cash advance at many savings banks overseas - again , it costs a little extra but don't like carrying money around that may get stolen - which happened to us in berlin - of all places !