If you want to go home after you get a PhD, I think you better ask several professors at your home universities. For example, I know very well that if I get PhD abroad it will mean nothing in my home country. They just don't accept it. For some wierd reason, PhD from a western country equals only to a Master's degree here. My choice was quite easy - I decided I wanted to live in the UK in future, so I applied to the British univesities.