I'll be accepting Oz. It didn't take me that long to decide.
I worked out the budget and Toronto's going to be cheaper (!) because I will be moving in with my girlfriend, which is a big, big, big bonus. Oz might be more impersonal, but I think that will be balanced by the fact that I will be living in Toronto. The faculty was the second reason for my about face, since there are a few profs whose written work I've enjoyed immensly in undergrad.