lovetotravel, there is a presidential election coming up on Sunday; and just like anywhere in the world, there is a "you do not know what might happen" factor after such an important post is filled. The definition of where this country is going will hopefully be presented to the people of Argentina once the next president sits in office sometime in December.
I say, visit BA and Santiago again. There are things that have changed and others that have not been touched by the passage of time, in both countries. What you liked then, you might not find now; so it is worth the investment of visiting again, I dare say, before taking the plunge of moving.
Good luck.