Georgia MPA seems to be very good if you are shooting for state or local government or a handful of federal agencies. I think they place a number of people in GAO every year and some in the Presidential Management Fellows program. I think it can also a good program if you want to go on to a PhD in public administration. And it's affordable. If you want to study public POLICY though, I talked to a student there who said the public policy concentration should in no way be mistaken for or compared to an MPP degree.
I know less about the other programs. Look carefully at Tech's course offerings. I think they have strengths only in a few policy areas - environment, technology and economic development (regional/urban, not international).