What do you want to do in the long term? As far as I understand it, an MBA is only worthwhile if you do a really good one, and they seem to prefer people with rather more working experience. I'm guessing from your post that you are interested in the N American model of formal PhD programmes with a taught element before the thesis? If so, you could look at Georgia Tech perhaps - I'm sure there are others too. But given how long US PhDs take unless you want an academic career, would it be worthwhile?