I'm afraid I have to agree that the field of EE you plan to do research in is of great importance. The reputation that each school has in the eyes of a particular employer is based on how they perform in whichever field of EE the employer is doing business, and not on various ranking lists. I know of some universities that are not that highly ranked but have a very high reputation in a certain field of EE. A further piece of advice is that since all these schools have approximately the same level of reputation, what you should base your decision on is what school has the type of research you want to be involved in. I have heard this advice from countless people, and have taken it myself. Having said that, international experience and education is a good door-opener.